Traders shrugged off a last-minute deal to avert an unprecedented default on American debt after heightened economic tension ignited an intense round of selling that sent the Dow plummeting for the eight-straight day. More headlines from FoxBusiness.com:http://email.foxnews.com/t?ctl=12555:7469D46E31DAE9CAE827323E006E7558&------------------------------------------------------------To learn more