In the 10-year U.S. bond yields rose strongly above 5%, the market "singing short" voice weakened。On Monday, Oct. 23, Eastern Time, hedge fund magnate and founder of Pershing Square Asset Management Bill Ackman (Bill Ackman) announced on social media that he had closed his short position in long-term U.S. debt。According to British media reports, Bill Ackerman made a profit of about $200 million by shorting 30-year U.S. Treasuries。Ackerman made $2.3 billion last year by shorting 2-year Treasuries。This means that Ackerman has made a cumulative profit of $2.5 billion ($18 billion) by shorting U.S. debt.。