九月份的最后十天统计上是股市最弱的十天，想调整自己股票portfolio的得抓紧时间了.

"Meanwhile, the S&P 500 has entered its “weakest 10-day period of the year” historically, according to a BofA Global Research note on Tuesday. That stretch, which is the last 10 days of this month, began Sept. 18, the note shows. "

https://www.marketwatch.com/story/s-p-500-slumps-to-bottom-of-bullish-uptrend-channel-as-investors-brace-for-fed-chair-powell-eeb8ef8a