Oprah Winfrey shares worth $12 million following Weight Watchers endorsement tweet

Winfrey's ringing endorsement saw share prices leap

Oprah Winfrey is auctioning off designer pieces from her closet for charity. (Getty Images)

It wasn’t just Weight Watchers who made huge financial gains from Oprah’s Winfrey’s 32-second endorsement.

The chat show queen made an estimated $12 million in just over an hour by sharing one tweet declaring she had lost 26lbs on the diet while still eating bread.

“I love bread,” she enthused to her 31 million followers. “That’s the genius of this programme. I lost 26 pounds and I have eaten bread every single day.”

Winfrey joined the board in October last year, buying 10 per cent of stock. The partnership saw share prices jump by more than 100 per cent.

Market Watch reports Weight Watchers shares jumped by 18 per cent after her tweet. Winfrey owns 6.4 million shares, translating to over $12 m - if she chose to sell them.