NEW YORK — U.S. stocks drifted lower on Monday to compound their sharp losses from last week.

The S&P 500 dipped 0.5% after flipping between small gains and losses several times through the day. The relatively modest moves followed its 1.7% tumble on Friday, which came after several weaker-than-expected reports on the U.S. economy.

The Dow Jones Industrial Average added 33 points, or 0.1%, while the Nasdaq composite fell 1.2%.

Berkshire Hathaway climbed 4.1% for one of the market’s bigger gains after Warren Buffett’s company reported a jumped in operating profits for the latest quarter. But even there, the good news came with a bit of caution.

The owner of Geico, BNSF railroad and other businesses said over the weekend that it’s sitting on a mountain of $334.2 billion in unused cash. Such a large amount could indicate Buffett, who’s famous for buying stocks when prices are low, may not see much worth purchasing in a market that critics say looks too expensive.