Short-selling interest in S&P 500 stocks has reached its highest since November last year as investors piled on bearish bets in the past month, underlining the scale of the sharp switch in market sentiment.
Short sellers such as hedge funds aim to profit from falling prices by borrowing stocks to sell and betting that prices will fall before they have to buy them back to unwind the loan.
Until last month, shorting interest had fallen to its lowest since at least 2008, according to Data Explorers, which tracks stock out on loan, considered a proxy for shorting activity.
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