 On March 18, 2011, Goldman Sachs acquired Federal Reserve approval to buy back Berkshire's preferred stock in Goldman.In December 2009, Goldman announced that its top 30 executives would be paid year-end bonuses in restricted stock that they cannot sell for five years, with clawback provisions.During the 2008 financial crisis, the Federal Reserve introduced a number of short-term credit and liquidity facilities to help stabilize markets.