Trading in the U.S. index futures suggests that Wall Street stocks may open notably higher on Wednesday. The excessive sell-off witnessed in recent sessions is considered as being overdone, as traders seek out bargains. That said, commodities are trading flattish even as the dollar gains some ground. In the absence of any major domestic economic news, the sustenance of gains could largely depend on trader perception of the domestic interest rate outlook, especially as the September FOMC meeting looms.