SAN FRANCISCO -- Retailers catering to both ends of the income spectrum are feeling the squeeze. With discount chain Target ( TGT) lowering its monthly sales forecast for October and upscale brand Coach ( COH) providing a conservative outlook for its holiday sales, it seems no one is protected from a weak retail environment. Both retailers have been viewed as strong, high-growth outperformers with infrequent sales missteps. "Makes you wonder how significant this consumer slowdown has been," says Ken Perkins, president of the research firm Retail Metrics. For the second month in a row, Target reduced its expectations for same-store sales, or sales at stores open at least a year. It now sees same-store sales in October growing 2% to 4%, down from its forecast of 3% to 5% given just a week and a half ago. Coach, which reported solid results for its recently ended first quarter, nonetheless cautioned that its U.S. holiday sales may see a slowdown from last year. It predicts a same-store sales rise in the low single digits for its North American retail sales, though it expects its outlet stores will grow at least in the mid-teens. The news sent Coach's stock tumbling 12% on Tuesday. It also raised concerns whether the luxury market, viewed as insulated from economic pressures, may now be feeling some pain. Perkins says that Target may be seeing a continuation of warm weather in October that hurt many apparel retailers in September because they were unable to clear out their fall merchandise.