Shares in sportswear maker Lululemon Athletica have plunged 21% at the start of trading on Wall Street.
Investors have been upset by the company's outlook for this year . For the first quarter it expects sales to fall, saying that it's range had not been selling well.
"We've clearly identified the issues: an assortment lacking depth and color for spring," said Chief Executive Officer Laurent Potdevin.
For last year the company reported a profit of $303m, up 14%.