Ex-Goldman Sachs Group Inc trader Matthew M. Taylor pleaded guilty on Wednesday to defrauding the Wall Street bank with an unauthorized $8.3 billion futures trade in 2007, saying he exceeded internal risk limits and lied to supervisors to cover up his activities. Taylor, 34, pleaded guilty to one count of wire fraud in federal court in lower Manhattan on Wednesday morning, after voluntarily turning himself into federal authorities earlier in the day. The Massachusetts Institute of Technology graduate pleaded guilty about four months after the Commodities Futures Trading Commission filed a civil complaint accusing him ... (full story)