Online retailer Amazon.com (AMZN) - Get Amazon.com, Inc. Report was up 7.4% in preopen Island trading after announcing it was taking over e-commerce operations for bookseller Borders (BGP) , relaunching its troubled Borders.com as a cobranded Web site.

Amazon leaped 34% Monday after saying it would post a narrower-than-expected loss for the first quarter.

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