X, a director of the DC Corporation, is informed by the corporation's accountant that the decline in the corporation's sales has resulted in a large fourth-quarter loss. Before the corporation's financial results for the year are announced to the public, X sells a large block of his shareholding in the corporation. When the news of the corporation's loss is announced, the price of the shares on the stock exchange falls by $10 per share.

What are the rights of Z, who purchased 1,000 shares from X at the higher price?