Unless you mean a specific market, it's older than pretty much any state in existence. Medieval European cities had stock markets. And that's assuming somethin

Unless you mean a specific market, it's older than pretty much any state in existence. Medieval European cities had stock markets. And that's assuming something like ancient Greece, didn't have a stock market, because that's possible, and if true it's older than every religion in existence today. And keep in mind that ancient Greece had an interstate cheque clearing system, shared ownership of companies, inheritance laws for dealing with such things, ... you know the sort of thing you'd expect a state to have in order to support a stock market. Lastly, we have no real idea what financial infrastructure ancient Egypt had, except of course, we do know it allowed for "international" (between partners under different governments) trade with both trading partners ~800km apart, while hiring intermediaries for passing along the goods. We just have no idea how it worked. If it happened to have a stock market, that makes the stock market roughly the age of stonehenge.