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.

US stocks saw a decline on Monday as investors continued to unload key tech shares that have been driving the bull market. The S&P 500 fell by 0.2%, while the Nasdaq Composite dropped 0.8%. The Dow Jones Industrial Average stood out as the relative outperformer,