share: digg facebook twitter NEW YORK (AP) — Renewed worries about Europe's debt problems set a grim tone for Wall Street on Wednesday, even as investors were getting fresh reports on the U.S. economy. Upbeat reports on retail sales, business inventories and wholesale prices lifted stocks and punished Treasurys on Tuesday. The rating agency Moody's warned that it may lower Spain's credit rating. In corporate news, Swiss pharmaceutical company Novartis AG announced Wednesday it was getting closer to buying the remaining shares of eye care company Alcon Inc.