SOURCE FOR EVERYTHING IN THIS POST IS FROM https://www.spytrader.net/
https://www.spytrader.net/single-post/2017/04/03/SP-500-Historical-Data-For-April-4th
S&P 500 | Historical Data For April 4th
April 3, 2017
Above you will see every year the S&P 500 has traded on the 4th of April since 1957. There have been 38 years this has happened and out of those 38 years it has been up 53% of the time and down 47%. There were 2 unchanged.
The largest percent up was April 4th 1997 with a 1.01% move up , and the largest percent down was April 4th 1986 with a -1.63% move down.
The smallest percent up was April 4th 2011 with a move up of .03% , and the smallest percent down was April 4th 1967 with a -.02%.
The average percentage move up was .36% and the average percentage move down was -.67%.
Lets take a deeper look. Since 1957 April 3rd has landed on a Monday 8 times and out of those 8 times 5 have been up days, that is 63%.
I have permission from https://www.spytrader.net/ to post this.