Global markets retreated this week amid risk aversion caused by the Bank of Japan's (BoJ) surprising decision to forego additional monetary easing and lackluster U.S. corporate earnings.

Despite the milestones for U.S. stocks, though, investors don't seem to be in a particularly celebratory mood.

Anthony Scaramucci has written The Little Book of Hedge Funds, an entertaining and informative book without the typical Wall Street bombast.