Stocks struggled to a mixed finish on Wall Street as the market closed out its best quarter in nearly five years, per the AP. Gains by technology and health care companies were offset by losses in other sectors Friday, including banks and materials companies. The S&P 500 index was little changed at 2,913, but it rose 7.2% in the third quarter. The Dow Jones Industrial Average added 18 points to 26,458, and the Nasdaq composite rose 4 points to 8,046. Tesla, meanwhile, plunged 13.9% after federal regulators sought to remove Elon Musk as CEO, accusing him of securities fraud. (Details on Musk's new predicament here.)