A few people here may have lived in a geographical area (Zimbabwe, Argentina, etc) which experienced hyperinflation in the last century, so any stories will be valuable related to the stock exchange of the country.
Pro precious metal types ("buy gold") sometimes use a hyperinflationary scenario as an example where owning gold is better than owning other assets. I do recall some family members mentioning inflation during the 70s in the United States and what it was like to go to the store and shelves of some good were empty because consumers knew that their price could rise later, as well as a few of them mentioning that the price rose while they were in the checkout line (this wasn't even a hyperinflationary scenario) and when I look at the S&P 500 during the 70s, it performed rather poorly (see this).
But that wasn't hyperinflation. So what happens to stock markets (or stocks) during hyperinflation? For instance, if a person owns $10,000 of the S&P 500, yet the dollar is hyperinflating at 50% a month, unless the S&P 500 is off-setting that loss every month, that person is becoming poor fast. There is this case from ZeroHedge, but is that how these events typically occur?