Banks and China spark Dow sell-off; Miners hit FTSE

Less than three hours into trading, the index had plunged almost 200 points, or 1.81%, to 10,531. Despite posting larger-than-expected Q4 losses, Bank of America was among the day's early winners, up 0.61%. The bank posted a net loss of $5.2bn as the cost of repaying its bailout emergency cash weighed heavily. J.P. Morgan, which also posted disappointing quarterly results, was up 0.19%. Bucking the trend was Wells Fargo, which reported a profit.   Kraft Foods - fresh from its takeover of Cadbury - was among the losers, falling 2.28%, while Boeing, down 1.35%, and Microsoft, do...