U.S. markets are higher midday but equity traders like Albert Fried¿s Ben Willis say they¿re still waiting for a correction that just has not materialized. Earlier Wednesday, Goldman Sachs issued a report saying the time had come for a correction but some selling associated with that report lasted only a short time. Willis says he isn't convinced that today's rally is a show of support for higher valuations. Willis points to the lackluster volume of trading to support his opinion. TheStreet¿s Debra Borchardt reports from the NYSE.