A fresh round of distress signals sounded in the retail industry this week, as another big-name chain announced hundreds of new store closings and still others moved aggressively to recalibrate their businesses for the online shopping stampede. Payless ShoeSource filed for Chapter 11 bankruptcy and outlined plans to immediately close nearly 400 of its 4,400 stores globally. Ralph Lauren is shuttering its flagship Polo store, a foot-traffic magnet located on tony 5th Avenue in Manhattan, the latest step in a massive cost-cutting effort. Big-box office supplies stalwart Staples is reportedly considering putting itself up for sale. The shake-out among retailers has been building for years, and it is now arriving in full force. The retrenchment comes as shoppers move online and begin to embrace smaller, niche merchants. As a result, many major chains now find themselves victims of a problem of their own making, having elbowed their way into so many locations that the nation now has more retail square footage per capita than any other. To use the industry vernacular, they are simply “overstored.” Many have begun cutting back, sending ripples through the economy. The wave of store closures by Macy’s and Sears alone will empty 28 million square feet of retail real estate, according to an analysis by research firm CoStar. Often those vacancies are slow to fill, leaving shopping centers less hospitable to the chains that remain, feeding even more departures and job losses. Read more at The Washington Post.