Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


notes to consolidated financial statements note 9 . collateralized agreements and financings collateralized agreements are securities purchased under agreements to resell ( resale agreements or reverse repurchase agreements ) and securities borrowed . collateralized financings are securities sold under agreements to repurchase ( repurchase agreements ) , securities loaned and other secured financings . the firm enters into these transactions in order to , among other things , facilitate client activities , invest excess cash , acquire securities to cover short positions and finance certain firm activities . collateralized agreements and financings are presented on a net-by-counterparty basis when a legal right of setoff exists . interest on collateralized agreements and collateralized financings is recognized over the life of the transaction and included in 201cinterest income 201d and 201cinterest expense , 201d respectively . see note 23 for further information about interest income and interest expense . the table below presents the carrying value of resale and repurchase agreements and securities borrowed and loaned transactions. . <table class='wikitable'><tr><td>1</td><td>in millions</td><td>as of december 2012</td><td>as of december 2011</td></tr><tr><td>2</td><td>securities purchased under agreements toresell1</td><td>$ 141334</td><td>$ 187789</td></tr><tr><td>3</td><td>securities borrowed2</td><td>136893</td><td>153341</td></tr><tr><td>4</td><td>securities sold under agreements torepurchase1</td><td>171807</td><td>164502</td></tr><tr><td>5</td><td>securitiesloaned2</td><td>13765</td><td>7182</td></tr></table> in millions 2012 2011 securities purchased under agreements to resell 1 $ 141334 $ 187789 securities borrowed 2 136893 153341 securities sold under agreements to repurchase 1 171807 164502 securities loaned 2 13765 7182 1 . substantially all resale and repurchase agreements are carried at fair value under the fair value option . see note 8 for further information about the valuation techniques and significant inputs used to determine fair value . 2 . as of december 2012 and december 2011 , $ 38.40 billion and $ 47.62 billion of securities borrowed , and $ 1.56 billion and $ 107 million of securities loaned were at fair value , respectively . resale and repurchase agreements a resale agreement is a transaction in which the firm purchases financial instruments from a seller , typically in exchange for cash , and simultaneously enters into an agreement to resell the same or substantially the same financial instruments to the seller at a stated price plus accrued interest at a future date . a repurchase agreement is a transaction in which the firm sells financial instruments to a buyer , typically in exchange for cash , and simultaneously enters into an agreement to repurchase the same or substantially the same financial instruments from the buyer at a stated price plus accrued interest at a future date . the financial instruments purchased or sold in resale and repurchase agreements typically include u.s . government and federal agency , and investment-grade sovereign obligations . the firm receives financial instruments purchased under resale agreements , makes delivery of financial instruments sold under repurchase agreements , monitors the market value of these financial instruments on a daily basis , and delivers or obtains additional collateral due to changes in the market value of the financial instruments , as appropriate . for resale agreements , the firm typically requires delivery of collateral with a fair value approximately equal to the carrying value of the relevant assets in the consolidated statements of financial condition . even though repurchase and resale agreements involve the legal transfer of ownership of financial instruments , they are accounted for as financing arrangements because they require the financial instruments to be repurchased or resold at the maturity of the agreement . however , 201crepos to maturity 201d are accounted for as sales . a repo to maturity is a transaction in which the firm transfers a security under an agreement to repurchase the security where the maturity date of the repurchase agreement matches the maturity date of the underlying security . therefore , the firm effectively no longer has a repurchase obligation and has relinquished control over the underlying security and , accordingly , accounts for the transaction as a sale . the firm had no repos to maturity outstanding as of december 2012 or december 2011 . 152 goldman sachs 2012 annual report .
Question: what was the amount of securities borrowed by the end of 2012, in billions?
Answer: 38.4
Question: and what was it in the end of 2011?
Answer: 47.62
Question: what was, then, the change throughout the year, in billions?

-9.22