Costs to Hedge the $9 Trillion S&P 500 Rally Jump Ahead of Fed

Sentiment in the US stock market has shifted quickly from fear of missing out to fear of getting wiped out.

Traders nervous about a further plunge in US stocks in the coming weeks are loading up on downside protection. That’s pushed the one-month skew, a measure of demand for options to protect against a drop in the S&P 500 Index, from the lowest in a year to a 72nd percentile of observations, according to data compiled by Mandy Xu, head of derivatives market intelligence at Cboe Global Markets Inc.

And sentiment among individual traders appears to have turned more bearish, with put buying making up 27% of all new positions opened by retail traders in Big Tech stocks on Friday, compared with just 15% a week prior.

“Friday’s selloff was meaningful in waking up traders to looming risks in the stock market,” Xu said by phone, referring to that day’s 2.6% drop in the S&P 500 and an almost 4.8% plunge in the Nasdaq 100 Index. “There had been a lack of hedging any downside risks after everyone was chasing the rally. But now we’re seeing a reversal on an index level, which signals investors see the potential for another leg lower in the market.”

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Another sign of increased demand for downside protection can be seen with the Cboe’s index put-to-call ratio, which has risen to match its highest level since September. The opposite has been happening on a single-stock level: Rising demand for index hedging comes as investors have been monetizing hedges on the single-stock level, instead of reaching for more.