Stocks were modestly lower at Tuesday's close, pulled down by weakness in the tech and health care sectors. IBM (IBM) shares led losses in tech after a disappointing third quarter. Tesla (TSLA) added to the Nasdaq's losses in the afternoon session after its Consumer Reports rating fell. The Tesla Model S is now rated as 'worse than average' for predicted reliability. Complaints from owners of the vehicle ranged from leaky sunroofs to faulty charging equipment. SanDisk (SNDK) jumped on reports it is in advanced talks to sell itself to Western Digital (WDC). A deal could be announced as soon as this week. Weight Watchers (WTW) rallied for its second straight day, extending big gains achieved on Monday.