Constellation Brands Inc.'s fiscal fourth-quarter sales dropped, although the company's loss narrowed amid fewer one-time charges compared with the year earlier period. But the company's shares dropped 5% to $15.99 in premarket trading after it gave a forecast that missed analyst views. The biggest global winemaker projected new-year earnings of $1.53 to $1.68 a share, excluding items. Analysts surveyed by Thomson Reuters expected $1.77. The new outlook "reflects a number of factors including an uncertain economic environment, continuing pressures on the Crown joint venture and the Australian and U.K. operations and incremental investments in marketing and a new technology platform," said President and Chief Executive Rob Sands.