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.

我是勒布朗·詹姆斯。来自俄亥俄州阿克伦。来自市中心。我甚至不应该出现在这里。

我不是说唱歌手，我是一个南极的传奇。

科学不仅仅是发现，更是责任。

The world is a fine place and worth the fighting for.