Investor concerns over the impact of the Omicron variant sent U.S. indexes tumbling Monday.


The S&P 500 slipped 1.7% to 4,541.24 in midday trading.


The Dow Jones Industrial Average fell 1.8% to 34,713.44, while the Nasdaq decreased 1.8% to 14,899.77.


Crude oil was off 5.8% to $66.77.


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Gold was down 0.6% to $1,793.70.


The yield on a 10-year Treasury fell 0.4% to 1.39%.


MEDICAL DEVICES

Shares of dental device maker Sonendo Inc. (NYSE: SONX) were down 10.2% to $6.49. The Laguna Hills company, with a market cap of $171 million, is down about 30% since it began trading in October.


FRANCHISING

Xponential Fitness Inc. (NYSE: XPOF) fell 6.8% to $18.07 for a market cap of $431.8 million. The Irvine fitness franchisor’s stock is still up, by 47.5%, since going public in July.