sept 15 reuters  us stocks opened slightly higher on wednesday as cooling inflation eased some fears of an early reduction in monetary stimulus while a slowing economic recovery and uncertainty over higher taxes kept gains in check the dow jones industrial average rose 34 points or 001 at the open to 3458095 the sp 500 rose 44 points or 010 at the open to 444749 while the nasdaq composite rose 336 points or 022 to 1507134 at the opening bell reporting by ambar warrick editing by maju samuel