Abercrombie & Fitch has abandoned plans to put itsel fupf ors ale. The struggling teen retailer announced its decision on Monda y,s ending its shares tumbling to a 17-year low. Investors’ hopes that a white knight would rescue the company were spark edin Ma y,w hen A&F said it was talking with several parties abo utap otential deal. Abercrombie & Fitch has been grappling with changing shopping trends. It’s clos edd ozen sof underperforming stores, although sale sr emain strong at it ss urf-inspired Hollister brand. It’s also working to improve performance at Abercrombie.