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Peter Tuchman highlights a dramatic trading session in which the S&P 500 experienced a $1.1 trillion market cap swing intraday. At 12:40 p.m., the index was down 2.17 percent but ultimately closed down only 0.26 percent.
Tuchman calls attention to the high volatility in U.S. markets and signals the need for further discussion about the underlying causes.
Tuchman previously noted the S&P 500 lost around $400 billion in market cap after a nine-day rally ended with a 0.5% decline in a single session, as detailed here. He also recently reported on the Dow Jones closing at a record high in a session marked by upbeat investor sentiment, covered here. These recent moves highlight continued shifts in major U.S. equity benchmarks.