The major U.S. index futures are currently pointing to a slightly lower open on Wednesday, with stocks likely to see further downside after ending yesterday's choppy session modestly lower.Stocks may extend the pullback seen over the past few sessions, which has seen the major averages close lower for three straight days as traders cash in on recent strength in the .Despite the recent weakness, the major averages are still poised to post substantial gains for the full year.The tech-heavy Nasdaq is heading ...