U.S. stocks declined sharply on Wednesday, led to the downside by technology shares as key inflation data showed higher-than-expected price pressures.
The Dow Jones Industrial Average fell 620 points, following its worst day since February on Tuesday. The S&P 500 lost 2%, while the tech-heavy Nasdaq Composite slid 2.5%.
The selling intensified after the S&P 500 fell below Tuesday's low, a level traders were watching closely because of the intraday rebound one day ago. Once the S&P fell below that low about an hour into the trading day, the benchmark fell even further.
Inflation accelerated at its fastest pace since 2008 last month with the Consumer Price Index spiking 4.2% from a year ago, compared to the Dow Jones estimate for a 3.6% increase. The monthly gain was 0.8%, versus the expected 0.2%.
Excluding volatile food and energy prices, the core CPI increased 3% from the same period in 2020 and 0.9% on a monthly basis. The respective estimates were 2.3% and 0.3%.
"Investors who may have been looking for a reason to lighten up on a stock market that was up more than 10% year to date found a good one: rising inflation," Chris Hussey, a managing director at Goldman Sachs, said in a note.
Investors have been fearful of a pickup in inflation as it could squeeze margins and erode corporate profits. If price pressures run too hot for a sustained period of time, the Federal Reserve would be forced to tighten monetary policy.
"There are people who think the Fed is not just behind the curve, they're maybe missing the point and by the time they start to play catch up, it's too late," Wall Street veteran Art Cashin said Wednesday on CNBC's "Squawk on the Street."
Tech shares, which have been under pressure this week and this month, led the decline again Wednesday as bond yields jumped. Shares of Alphabet, Microsoft, Facebook, Amazon and Apple all fell more than 2%, while shares of chipmakers Nvidia and AMD were also lower. Tesla slid about 3%.
Strength in bank stocks and energy shares, which could do well in an inflationary environment, helped support the broader market. JPMorgan rose 1%, while Occidental Petroleum climbed 6.5%. Chevron also traded 2% higher.
The technology sector pulled off a big intraday reversal in the previous session where the Nasdaq Composite erased a loss north of 2% and ended the day flat. The blue-chip Dow, however, lost more than 450 points. The S&P 500 slipped 0.9%, but avoided its second straight 1% loss.
The Technology Select Sector SPDR is off by nearly 2% this week and 5% this month, as investors reassess the group's high valuations in the face of rising inflation.
— CNBC's Kevin Stankiewicz contributed reporting.
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