Whispers about the possibility of a "Black Monday" began to circulate late last week as a harrowing unwind in emerging markets, a shaky Chinese equity market, and a seemingly confused Federal Reserve put markets from New York to Shanghai on edge. Sure enough, a sharp decline in Gulf markets on Sunday, followed immediately by a bloodbath in China and emerging markets on Monday led the Dow to fall by more than 1,000 points out of the gate. If you were looking for the surest sign yet that things are getting truly precarious, look no further than Twitter, where #BlackMonday is now trending. https://twitter.com/hashtag/BlackMonday!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");