Stocks got off to a weak start and remained in the red until the closing bell Thursday as investors confronted data that showed inflation in September came in a bit hotter than predicted and an unexpected rise in initial weekly jobless claims. In the semiconductor space, Advanced Micro Devices slid 4% in the heaviest turnover on a down session since Aug. 2. AMD continues to build a long base, so it still has potential to break out and resume leadership in the stock market today.