Take a deep breath and relax. This is NOT 1928.
This is the Walmart chart. YOU should learn to NOT trust news or retail gossip but trust charts. Charts do not lie or deceive. Walmart is NOT down 800 points. That is simply false statements and if these are being rushed to retail investors then the SEC will fine the perpetrator of these lies.
The largest drop in Walmart (WMT) price was back in November 2023 and that was a 10 point gap down on weak earnings news. today it is down about 80 CENTS. No big deal.
I encourage you to learn to read stock charts. Turn off the TV news, turn off your phone news, turn off the internet news. It is always either old news or manipulated news and totally irrelevant to what is actually going on in the stock market.