NEW YORK>> Stocks shook off an early stumble to finish with slim gains on Wall Street Thursday and close out their first winning week since the start of the Iran war.

The early decline for stocks was driven by a surge in oil prices following a national address late Wednesday from President Donald Trump. He vowed the U.S. will continue to attack Iran and failed to offer a clear timetable for ending the conflict in the Middle East. Oil prices eased slightly during the day, but still remain elevated well above $100 per barrel.

The S&P 500 rose 7.37 points, or 0.1%, to 6,582.69. Several days of solid gains this week helped the benchmark index notch a 3.4% gain for the week. That’s the first weekly gain since the conflict started for the index at the heart of many 401(k) accounts. Stock markets will be closed for Good Friday.

The Dow Jones Industrial Average fell 61.07 points, or 0.1%, to 46,504.67. The Nasdaq composite rose 38.23 points, or 0.2%, to 21,879.18. Both indexes also notched weekly gains.

A barrel of U.S. crude oil rose 11.3% to $111.54, though prices rose close to $114 at one point during the day. The price of Brent crude, the international standard, jumped 7.8% to $109.03 per barrel.

Crude oil prices have been the main force behind the sharp swings for stocks globally. Shipping traffic has been severely curtailed in the Strait of Hormuz, where a fifth of the world’s traded oil passes through during peacetime.

Crude oil prices had been sliding back toward $100 per barrel prior to Trump’s address on Wednesday. The U.S. only relies on the Persian Gulf for a fraction of the oil it imports, but oil is a commodity and prices are set in a global market. A disruption anywhere affects prices everywhere.

Stocks have been broadly sliding since the war began, with indexes often rising and falling sharply along with statements from Trump about the direction of the war. Just on Monday, the S&P 500 briefly neared a 10% drop from its record, a steep-enough fall that professional investors have a name for it: a “correction. The index gained ground Tuesday and Wednesday on hope that the war could end soon.