Ran-dumb:

DIX went limp today, $SPX must be doomed!  

Na

$SPX gains 1% or more &amp; closes at a 20 day high - DIX closes at a 20 day low. 

Only dates that match:

7/14/2020
4/27/2020
4/1/2019
9/11/2017
4/24/2017
3/1/2017
4/12/2016
10/22/2015
12/17/2012
10/26/2011