The 10-year Treasury yield ( ^TNX) added to recent gains to touch a 14-month high, trading around 4.8% as US bonds sold off. Meanwhile, the dollar ( DX-Y.NYB) surged to a two-year high against major currency peers, with the UK pound ( GBPUSD=X ), in particular, coming under pressure.

The S&P 500 and Nasdaq have both felt pressure as shares of major tech companies came under pressure Monday. Investors continue to keep a close eye on rising Treasury yields, which heighten worries about valuations, particularly for some of the market's most highly valued names.

U.S. stock indexes were split on Monday as gains for oil-and-gas producers helped offset drops for Nvidia and other Big Tech companies. The S&P 500 rose 0.2% after erasing an earlier fall of 0.9%. The Dow Jones Industrial Average climbed 358 points,