U.S. stocks were mostly higher, led by a 4.4% rise in Alphabet shares, after a Bloomberg report that Google's Gemini artificial-intelligence engine could be used in Apple's iPhone.
The DJIA rose 0.2%, or 75 points, to 38790, the S&P 500 gained 0.6% to 5149 and the Nasdaq climbed 0.8% to 16103.
Apple shares rose 0.6% and Nvidia gained 0.7%. Tesla gained 6.3%, its largest increase since 11 September.
Attention will turn to the Fed later this week as the central bank is widely expected to keep interest rates steady at the conclusion of its two-day policy meeting on Wednesday.