BANGKOK – The roller-coaster ride for AI stocks snapped back down on Tuesday and dragged Wall Street lower.

The S&P 500 fell 0.4% even though the majority of stocks within the index rose. The drops for stocks in the artificial-intelligence industry dragged the Nasdaq composite down 1.2%, while the Dow Jones Industrial Average dropped 130 points, or 0.2%, from its record.

The weakness began in Asia, where Samsung Electronics tumbled 6.9% in Seoul. The tech giant gave a preliminary look at its performance for the second quarter, and the numbers were strong. Samsung Electronics said it expects to report its operating profit surged roughly 1,800% from a year earlier.

Analysts called the numbers surprisingly good, but they still weren’t…