Winter is already blowing cold for retailers. Just this week, J.C. Penney (JCP +0.00%) reported a 26% decline in same-store sales as Kohl's (KSS 3.07%) warned that steep discounting could take a big bite out of Q4 results. Yet neither fared so poorly as Groupon (GRPN +3.40%), which fell 29% after reporting a meager 3% gain in European sales during the third quarter. Troubling? Sure, but declining cash flow is far more worrisome. Find out why in the following video.
