Maybe the best thing you can say about the worst January for stocks in seven years is that an excess of optimism won’t be a problem for equities in 2016.Even with the Standard & Poor’s 500 Index’s rebound in the final two weeks, it wasn’t enough to reverse a selloff that at its lowest point erased $2.5 trillion from American shares. It could’ve been worse. After tumbling to a 21-month low, the benchmark ended the month with its biggest one-day rally since September to trim the monthly loss to 5.1 percent.

Source: Trauma Lingers as Stocks’ Worst January Since 2009 Incites Angst – Bloomberg Business