Capitalism is defined by having the capitalist, who provides capital, and without the ability to sell their share of stock it's difficult to see what the value would be. So you kind of require stock markets.
Edit: which is why it's odd to call China communist. They have 3 stock exchanges. They're really a capitalist single-party state.
The stockmarket enables that by making takeovers easier as you have a higher proportion of short termist shareholders who 1) fail to block value destroying acquisitions on one side and 2) jump at the chance to make a quick profit on the other.
In the U.S. we have mistaken Capitalism for a religion, and so it wags the dog, so to speak. Since our founding we have made some attempts at finding a balance between our use of the tools of Capitalism and socialism (in more the Democratic Socialism style, rather than the Communism style), and we had a good run in the decades after WWII. But starting with McCarthyism, and really picking up under Regan we have prided ourselves on adopting Capitalism as a religion, and it really shows up in both the income inequality as well as the increasing role of (and corrupting influence of) money in our politics/government.
"The term “free market capitalism” refers to an economy that puts no or minimal barriers in the way of privately owned businesses. Matters such as worker rights, environmental protection, and product safety will be addressed by businesses as the marketplace demands."
it's basically worship of owning the means of production and not being regulated in its use, e.g. if you own a company you get to dictate all sorts of unreasonable things to your employees, and any benefits gained from automation accrue to whoever can afford the up front money to own the machines.
There are better definitions on both wikipedia and Britannica:
https://en.wikipedia.org/wiki/Free_market_capitalism
https://www.britannica.com/money/free-market
Especially this hit:
https://en.wikipedia.org/wiki/Free_market_capitalism#Concept...
Please get your definitions from someone reasonable (Adam Smith might be a good start) rather than Ayn Rand.
> “The Congress shall have Power… To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;”