Alcoa, Inc. Shares Slide 26.9% Below Tata's Purchase Price

There's an old saying on Wall Street about insider buying: there are many possible reasons to sell a stock, but only one reason to buy. Back on April 10, Alcoa, Inc.'s Director, Ratan Tata, invested $44,725.02 into 3,405 shares of AA, for a cost per share of $13.14..