Lynn Martin has been the 68th president of the New York Stock Exchange for six months, and so far, her tenure has coincided with a period of extreme volatility.
It started out on an auspicious note. On Jan. 3, her first day on the job, the S&P 500 and the Dow Jones Industrial Average closed at new highs. But since then, the two indexes have fallen about 20% and 15%, respectively.
