Wall Street is making a good case for buying stock in Maalox and Tums. In another stomach-churning day Tuesday, stocks plunged in the morning, then pulled off a late-afternoon rally, ending the day in positive territory and recouping some of the losses from the market's two-day plunge. "The positive for the market is that we came back today in very convincing fashion, but I certainly would not say it's all done, the Wicked Witch is dead," said JJ Kinahan, chief investment strategist for TD Ameritrade.