priceline.com (PCLN) was down 15.8% in late afternoon after a weeklong climb that peaked Wednesday with a high of $7.79. The name-your-price online retailer reported a narrower than expected first-quarter loss after the close Tuesday, and said it expects to post a small profit in the second quarter.

Amazon

(AMZN) - Get Report

was down 3.5%, and

Barnes&Noble.com

(BNBN)

was down 3.4%.