'Beware of the oddity': A Wall Street firm studied every market crash over the last 150 years to reveal how abnormal this one is — and concluded that stocks are doomed for another fall

· A Societe Generale study of bear markets since 1870 showed that the current bear-market rally is a departure from history.  
· Andrew Lapthorne, the firm's head of quant strategy, concluded that investors are taking an early victory lap for the economy even after accounting for trillions in stimulus spending. 
· He...