Huh, that's better than I expected.

So if they screwed something up, and somehow lost all of your stock and cash, your cash would be covered by the FDIC and your stock would be lost? (Assuming they don't have some sort of supplemental insurance to cover loss of stock.)

SEC has consumer protection rules for stocks. Even if they're managed by a brokerage, they're yours, even if the brokerage falls into insolvency

I'm replying to myself, but for the curious: FDIC covers bank accounts; SIPC covers securities accounts.