By Mike Dolan -What matters in U.S. and global markets today By Mike Dolan, Editor-At-Large, Finance and Markets Signs that U.S. economic activity remains brisk helped steady the stocks ship, but this also cast more doubt on why the Federal Reserve needs to ease again next month and that has pushed Treasury yields higher. The week's latest tech wobble calmed on Wednesday as service sector surveys impressed, although valuation concerns smoldered. Chip designer Qualcomm's stock fell back 4% overnight des ...