Wall Street tacks on some more gains following its best week of the year Boston 25 News [Video]

NEW YORK — (AP) — U.S. stocks are ticking higher Monday as Wall Street’s roller coaster of a summer levels out a bit.

The S&P 500 was 0.6% higher in afternoon trading, coming off its best week of the year. The Dow Jones Industrial Average was up 173 points, or 0.4%, as of 1:48 p.m. Eastern time, and the Nasdaq composite was 0.7% higher.

Among the biggest movers in the mostly quiet market was chip company Advanced Micro Devices. It rose 2.9% after saying it would buy ZT Systems, a supplier in the cloud computing and artificial-intelligence industries, in a cash-and-stock deal valued at $4.9 billion.

That helped offset a 3.2% drop for Guess? Inc., which said its chief financial officer is stepping down to pursue another opportunity. The apparel and accessories company said it’s begun a search for its next CFO and appointed an interim.

Trading was quiet elsewhere, including in the bond market. Treasury yields were easing a bit ahead …