{"transactions":[{"id":3371106,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Options to Acquire Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"exercise","acquired":false,"shares":8202,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"All options of this tranche have been exercised. The total number of performance share units from tranches with different performance measures, performance periods and vesting dates is 20,258."}],"balance_after":0,"derivative":{"exercise_price":19.24,"exercise_date":"2016-02-07","expiration_date":"2020-02-07","underlying":"Common Shares","underlying_shares":8202},"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3371105,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Options to Acquire Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vested as follows: 1/3 on 02/24/2011, 1/3 on 02/24/2012 and 1/3 on 02/24/2013."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"All options of this tranche have been exercised. The total number of performance share units from tranches with different performance measures, performance periods and vesting dates is 20,258."}],"balance_after":0,"derivative":{"exercise_price":19.79,"expiration_date":"2020-02-24","underlying":"Common Shares","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3371104,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"sale","acquired":false,"shares":5702,"price":48.06,"value":274038.12,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Common Shares sold by the Reporting Person and reported herein were sold at a range of between $48.04 and $48.13 per share. The sale price reported above represents the weighted average sale price for the reported transaction and has been rounded to the nearest cent. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such price range."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Total includes 650 shares purchased on 06/30/2019 pursuant to the Assured Guaranty Ltd. Employee Stock Purchase Plan which meets the requirements of Rule 16b-3."}],"balance_after":172144.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3371103,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"exercise","acquired":true,"shares":8202,"price":19.24,"value":157806.48,"ownership":{"direct":true},"balance_after":177196.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3371102,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"sale","acquired":false,"shares":7011,"price":48.07,"value":337018.77,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Common Shares sold by the Reporting Person and reported herein were sold at a range of between $48.04 and $48.14 per share. The sale price reported above represents the weighted average sale price for the reported transaction and has been rounded to the nearest cent. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such price range."}],"balance_after":168994.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3371101,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-11-14T21:58:34.000Z","date":"2019-11-12","kind":"exercise","acquired":true,"shares":10000,"price":19.79,"value":197900.0,"ownership":{"direct":true},"balance_after":176005.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-056584","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119056584/doc4.xml","form_type":"4"}},{"id":3622957,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-03-01T23:57:22.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":6983,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\"). With limited exceptions, the restricted stock units vest on 2/27/2022, assuming that the holder remains employed at such time.  Upon vesting, one Common Share will be delivered for each vested restricted stock unit."}],"balance_after":166005.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-015198","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119015198/doc4.xml","form_type":"4"}},{"id":3631641,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Performance Share Units","published_at":"2019-02-26T23:13:57.000Z","date":"2019-02-24","kind":"exercise","acquired":false,"shares":14415,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2017 to 12/31/2018), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2017 to 12/31/2018), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2017 to 12/31/2018), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2017 to 12/31/2018), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Total includes performance units from tranches with different performance measures, performance periods and vesting dates, but does not include 19,600 outstanding option."}],"balance_after":20258,"derivative":{"underlying":"Common Shares","underlying_shares":14415},"source":{"system":"sec-edgar","filing":"0001209191-19-013703","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119013703/doc4.xml","form_type":"4"}},{"id":3631640,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-02-26T23:13:57.000Z","date":"2019-02-24","kind":"tax_withholding","acquired":false,"shares":14119,"price":41.55,"value":586644.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Common Shares being withheld to pay tax liability."}],"balance_after":159022.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-013703","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119013703/doc4.xml","form_type":"4"}},{"id":3631639,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-02-26T23:13:57.000Z","date":"2019-02-24","kind":"exercise","acquired":true,"shares":28830,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2017 to 12/31/2018), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."}],"balance_after":173141.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-013703","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119013703/doc4.xml","form_type":"4"}},{"id":3631638,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2019-02-26T23:13:57.000Z","date":"2019-02-24","kind":"tax_withholding","acquired":false,"shares":7107,"price":41.55,"value":295295.85,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Common Shares being withheld to pay tax liability."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Total includes 734 shares purchased on 06/30/2018 pursuant to the Assured Guaranty Ltd. Employee Stock Purchase Plan which meets the requirements of Rule 16b-3."}],"balance_after":144311.3073,"source":{"system":"sec-edgar","filing":"0001209191-19-013703","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919119013703/doc4.xml","form_type":"4"}},{"id":3735308,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Options to Acquire Common Shares","published_at":"2018-12-12T00:08:26.000Z","date":"2018-12-10","kind":"exercise","acquired":false,"shares":6723,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"All options of this tranche have been exercised. Total includes options from other tranches with different exercise prices, vesting dates and expiration dates, but does not include 34,673 performance share units of various tranches."}],"balance_after":19600,"derivative":{"exercise_price":17.44,"exercise_date":"2015-02-09","expiration_date":"2019-02-09","underlying":"Common Shares","underlying_shares":6723},"source":{"system":"sec-edgar","filing":"0001209191-18-062081","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118062081/doc4.xml","form_type":"4"}},{"id":3735307,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2018-12-12T00:08:26.000Z","date":"2018-12-10","kind":"exercise","acquired":true,"shares":6723,"price":17.44,"value":117249.12,"ownership":{"direct":true},"balance_after":150684.3073,"source":{"system":"sec-edgar","filing":"0001209191-18-062081","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118062081/doc4.xml","form_type":"4"}},{"id":4036729,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Performance Share Units","published_at":"2018-02-23T22:00:11.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":11442,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Performance share units awarded pursuant to the Plan.  Each performance share unit represents a contingent right to receive one Common Share of the Company. With limited exceptions, the performance share units vest on 2/21/2021, if at all, at the end of the performance period (7/1/2019 to 12/31/2020), assuming that the holder remains employed at such time, based on the Company's Common Share price using the highest 40-day average stock price during the performance period as follows: 200% if the share price reaches $50; 100% if the share price reaches $46; and 50% if the share price reaches $42 (with interpolation between those prices).  If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. Upon vesting, one Common Share will be delivered for each vested performance share unit."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance share units awarded pursuant to the Plan.  Each performance share unit represents a contingent right to receive one Common Share of the Company. With limited exceptions, the performance share units vest on 2/21/2021, if at all, at the end of the performance period (7/1/2019 to 12/31/2020), assuming that the holder remains employed at such time, based on the Company's Common Share price using the highest 40-day average stock price during the performance period as follows: 200% if the share price reaches $50; 100% if the share price reaches $46; and 50% if the share price reaches $42 (with interpolation between those prices).  If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. Upon vesting, one Common Share will be delivered for each vested performance share unit."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Performance share units awarded pursuant to the Plan.  Each performance share unit represents a contingent right to receive one Common Share of the Company. With limited exceptions, the performance share units vest on 2/21/2021, if at all, at the end of the performance period (7/1/2019 to 12/31/2020), assuming that the holder remains employed at such time, based on the Company's Common Share price using the highest 40-day average stock price during the performance period as follows: 200% if the share price reaches $50; 100% if the share price reaches $46; and 50% if the share price reaches $42 (with interpolation between those prices).  If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. Upon vesting, one Common Share will be delivered for each vested performance share unit."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Total includes performance units from other tranches with different performance measures, performance periods and vesting dates, but does not include 30,694 outstanding options of various tranches."}],"balance_after":34673,"derivative":{"underlying":"Common Shares","underlying_shares":11442},"source":{"system":"sec-edgar","filing":"0001209191-18-013037","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118013037/doc4.xml","form_type":"4"}},{"id":4036728,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2018-02-23T22:00:11.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":11442,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\"). With limited exceptions, the restricted stock units vest on 2/21/2021, assuming that the holder remains employed at such time.  Upon vesting, one Common Share will be delivered for each vested restricted stock unit."}],"balance_after":143961.3073,"source":{"system":"sec-edgar","filing":"0001209191-18-013037","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118013037/doc4.xml","form_type":"4"}},{"id":4073558,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Performance Share Units","published_at":"2018-02-06T21:42:51.000Z","date":"2018-02-04","kind":"exercise","acquired":false,"shares":11728,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2016 to 12/31/2017), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2016 to 12/31/2017), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2016 to 12/31/2017), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2016 to 12/31/2017), 200.00% of the performance share units granted became vested.  The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Total includes performance units from other tranches with different performance measures, performance periods and vesting dates, but does not include 30,694 outstanding options."}],"balance_after":23231,"derivative":{"underlying":"Common Shares","underlying_shares":11728},"source":{"system":"sec-edgar","filing":"0001209191-18-007876","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118007876/doc4.xml","form_type":"4"}},{"id":4073557,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2018-02-06T21:42:51.000Z","date":"2018-02-04","kind":"tax_withholding","acquired":false,"shares":11487,"price":35.19,"value":404227.53,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Common Shares being withheld to pay tax liability."}],"balance_after":132519.3073,"source":{"system":"sec-edgar","filing":"0001209191-18-007876","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919118007876/doc4.xml","form_type":"4"}},{"id":4073556,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Comnmon Shares","published_at":"2018-02-06T21:42:51.000Z","date":"2018-02-04","kind":"exercise","acquired":true,"shares":23456,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty Ltd. 2004 Long-Term Incentive Plan (the \"Plan\").  Using the highest 40-day average stock price during the performance period (7/1/2016 to 12/31/2017), 200.00% of the performance share units granted became vested.  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Each performance share unit represents a contingent right to receive one Common Share of the Company. With limited exceptions, the performance share units vest on 2/22/2020, if at all, at the end of the performance period (7/1/2018 to 12/31/2019), assuming that the holder remains employed at such time, based on the Company's Common Share price using the highest 40-day average stock price during the performance period as follows: 200% if the share price reaches $50; 100% if the share price reaches $46; and 50% if the share price reaches $42 (with interpolation between those prices).  If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. Upon vesting, one Common Share will be delivered for each vested performance share unit."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance share units awarded pursuant to the Plan.  Each performance share unit represents a contingent right to receive one Common Share of the Company. With limited exceptions, the performance share units vest on 2/22/2020, if at all, at the end of the performance period (7/1/2018 to 12/31/2019), assuming that the holder remains employed at such time, based on the Company's Common Share price using the highest 40-day average stock price during the performance period as follows: 200% if the share price reaches $50; 100% if the share price reaches $46; and 50% if the share price reaches $42 (with interpolation between those prices).  If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. 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If the share price does not reach $42, none of the performance share units will vest."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"To the extent unvested performance share units do not become vested units at the end of the applicable performance period as described above, such unvested performance share units will expire at the end of such performance period. 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Upon vesting, one Common Share will be delivered for each vested restricted stock unit."}],"balance_after":125769.3073,"source":{"system":"sec-edgar","filing":"0001209191-17-014373","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919117014373/doc4.xml","form_type":"4"}},{"id":4463889,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Performance Share Units","published_at":"2017-02-07T21:44:55.000Z","date":"2017-02-05","kind":"exercise","acquired":false,"shares":9252,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty 2004 Long-Term Incentive Plan (the \"Plan\").  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The number of Common Shares delivered equals the number of performance share units granted multiplied by 200.00%."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Total includes performance units from other tranches with different performance measures, performance periods and vesting dates, but does not include 30,694 outstanding options."}],"balance_after":26143,"derivative":{"underlying":"Common Shares","underlying_shares":9252},"source":{"system":"sec-edgar","filing":"0001209191-17-008376","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919117008376/doc4.xml","form_type":"4"}},{"id":4463888,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Common Shares","published_at":"2017-02-07T21:44:55.000Z","date":"2017-02-05","kind":"tax_withholding","acquired":false,"shares":8877,"price":40.01,"value":355168.77,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Common Shares being withheld to pay tax liability."}],"balance_after":116953.3073,"source":{"system":"sec-edgar","filing":"0001209191-17-008376","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1273813/000120919117008376/doc4.xml","form_type":"4"}},{"id":4463887,"issuer":{"id":4169,"kind":"organization","name":"ASSURED GUARANTY LTD"},"owners":[{"id":153807,"kind":"person","name":"Stern Bruce E.","position":1,"cik":"0001539879","reported_name":"Stern Bruce E.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Officer"}}],"security":"Comnmon Shares","published_at":"2017-02-07T21:44:55.000Z","date":"2017-02-05","kind":"exercise","acquired":true,"shares":18504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Performance share units awarded pursuant to the Assured Guaranty 2004 Long-Term Incentive Plan (the \"Plan\").  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