It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife.

Trend-following is not such a good model. It’s simply eroded. Things change and being able to adjust is what made Mr. Simons so successful. “Statistic predictor signals erode over the next several years； it can be five years or 10 years. You have to keep coming up with new things because the market is against us. If you don’t keep getting better， you’re going to do worse.

君子做学问，是为了完善自己；小人做学问，是为了哗众取宠。