Micron Technology MU.O shares dropped 6.7% after the company said it would reduce memory chip supply and make more cuts to its capital spending plan. By Lewis Krauskopf, Amruta Khandekar and Ankika Biswas Nov 16 (Reuters) - Wall Street's main indexes ended lower on Wednesday as a grim outlook from Target spurred fresh concerns about retailers heading into the crucial holiday season, while semiconductor shares slid after Micron's supply cut. Stocks had staged a big rally over the past month, after softer-than-expected inflation data raised hopes the U.S. Federal Reserve could get less aggressive with interest rate hikes.