> there are conceivable circumstances where the "stock market" can go not just to zero but negative
No there are not. As a shareholder you cannot be held accountable for losses of the company you're holding the shares of. In the worst case, your share becomes worthless.
No there are not. As a shareholder you cannot be held accountable for losses of the company you're holding the shares of. In the worst case, your share becomes worthless.