The S&P 500 and Nasdaq both ended at records as the promise of tax reform from the White House fueled gains across major banks. Tech fluctuated after Apple Inc. (AAPL) unveiled three new models of smartphone and a new version of its Apple Watch.

McDonald's Corp. (MCD) took a bite out of the Dow Jones Industrial Average after data tracking company M Science published a bearish report calling into question strength in comparable-store sales in its current quarter. It's the company's worst one-day drop since July 2016.

Amazon.com Inc.'s (AMZN) efforts to slash prices at Whole Foods Market has generated a 25% increase in traffic. Amazon completed its purchase of the supermarket chain last month.

Perrigo Co. (PRGO) climbed after Starboard Value Jeff Smith pinpointed the drugmaker as a solid buy, noting that it trades at a steep discount to its peers. Smith's activist fund had secured five director seats on Perrigo's board earlier in the year.

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