Thank you for posting this, that was my first assumption reading the headline. Anytime I see numbers without a percentage in a headline, or vis versa, I'm immediately suspicious.
After all, there are 3 types of lies: lies, damned lies, and statistics.
I think at this point anyone still on Robinhood knows what they're getting into. If after turning off the buy button you didn't get a big boy broker, that's on you.
Random speculation: Could be banks needing to pull out of the market due to the Fed signaling September rate cuts due to the higher-than-expected unemployment report. This will cause a drop in yield for savings, which would cause people to reduce what they have in those accounts.
Well, they announced a rate hike in Japan, so that would seem to be a more immediate cause.
In fact, there's some analysis that suggests that Japan's rate hike contributes to the dip in the other markets. Evidently it was a thing for people to borrow yen, use that to get other currencies, and then buy stock and sell the stock to repay the loans. Since the yen has climbed 14% versus the USD in the past few days, those loans suddenly became awfully expensive.
Most of the money banks "have" they created it themselves (it's called Fractional Reserve Lending and there's a wonderful paper on it by somebody at the Bank Of England called "Money creation in the Modern Economy").
The whole "banks lend out depositors' money" thing hasn't been true since the 80s.
Also nowadays most of the money in leveraged investments comes from the Money Markets (so rich people and pension funds) rather than banks.
That said, your point still stands since a reduction of deposits might impact banks' reserves (basically central banks force them to have the equivalent of about 3-5% of their loans as reserves), it would force a wider retrenchment of their loans, but by itself the impact of that on the entire leveraged investment universe should be limited because they're not the main players in the Money Markets.
Usually war is a way to stop a recession/depression since its so profitable.
When you're selling into a war market, you can make a lot of money. When you're in that war market you tend to lose a lot of your expensive durable capital very quickly, which can get very expensive.