 US stocks fell in early trading as concern over an economic slowdown weighed on risk sentiment. Treasuries declined, sending yields higher across the curve. The SP 500 Index dropped for a third day, after the benchmarks biggest selloff in a month Wednesday. The tech-heavy Nasdaq 100 fell as much as 1.1. Treasuries retreated with the 10-year yield up 3 basis points, and the euro traded firmer after the head of the European Central Bank reaffirmed her aggressive stance. The dollar weakened. On... 