Drops for Nvidia and other tech stocks are weighing on Wall Street Monday and keeping it in its weekslong rut. The S&P 500 was down 0.6% in midday trading, coming off its fourth losing week in the last five.

U.S. stocks rose modestly in choppy trade on Tuesday as investors gauged inflation data and braced for quarterly earnings reports to justify stock valuations and the strength of the U.S. economy. Stocks received an initial lift after a Labor Department report showed the producer price index rose less than expected in December,

U.S. stocks are ticking higher Tuesday following an encouraging update on inflation. The S&P 500 was 0.5% higher in early trading. The Dow Jones Industrial Average was up 164 points, or 0.4%, as of 9:35 a.