Investor risk appetite has returned to levels seen before the Iran conflict, according to Goldman Sachs analysts. ChainCatcher reports that the stock market's volatility has significantly decreased as investors bet against the worst-case scenario in the U.S.-Iran tensions. Retail investors in the U.S. are re-entering the stock market, and automated trading is contributing to the market's rise. In the four weeks leading up to last Wednesday, investors withdrew nearly $125 billion from money market funds, marking one of the largest outflows on record.