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.

指文章的创作是流传千古的事业，而其中的得失只有作者自己心里最清楚。

人生は、運と偶然と、ちょっとの勇気でできている。