A mystery trader keeps betting that the stock market will go crazy

A trader just rolled over a massive volatility bet that could pay out $260 million if all goes according to plan. The wager is on a large increase in the VIX, which serves as the stock market's fear gauge and has been sitting near record-low levels for months. The market's foremost volatility bull is at it yet again. Just over two months after rolling over a humongous wager that the CBOE Volatility Index, or VIX, would surge from its subdued levels by December, the volatility...