* In the past 61 years, the Dow closed up in September 24 times, or 39% of the time
* Of the 24 instances that the Dow was positive in September, the index followed with a gain in October 13 times, or 54% of the time
* The average gain in October when September was positive stands at 0.53%
* The biggest gain in October following a positive September was recorded in 1998, when the index rose 9.56%
所以是随机的
