– Want to win in the stock market? Start paying attention to Oprah's waistline. Bloomberg reports Weight Watchers stocks rose up to 22% Tuesday after Oprah announced she lost 26 pounds using the program. Oprah—an investor and spokesperson for Weight Watchers—tweeted a video in which she claims she was able to lose the weight while continuing to eat her beloved bread. That tweet appears to be responsible for sending Weight Watchers shares as high as $13.54. Weight Watchers stock performing inversely to Oprah's weight is a growing trend, as the same thing happened a few months ago when the star announced on Ellen that she'd lost 15 pounds, according to CBS News. Oprah bought a 10% stake in Weight Watchers last October.