Usually you don't borrow to the limit of the value of your stocks.
Margin rates are different but usually related to how much you can borrow.
We'll definitely return to your example later, but I see you don't understand my point in my example, I have to explain it gurther.
I don't trade and don't have stocks, I am just interested in economy, so you may correct me in exact figures.
I presume collateral for a loan is usually about 80%, is it correct for the US?
It means that having stocks worth 100 mln dollars your limit of credit would be 80 mln.
You got it. But stocks fall by 20%. No, let it be even 5%. It means your collateral now is worth 76 mln and the bank comes to you with demand to either add some stocks worth 4 mln or pay the same sum in money.
If you got not 80 mln but let us say 60 mln - you proposed this sum - so, it means a credit worth 60 mln requires collateral worth 75 mln. You allocated 75 mln of your stocks as collateral.
Then, if stocks drop by 20%, then 75 mln f collateral turn into 60 mln, and if collateral must be 80% of price of stocks then your collateral is now worth 48 mln.
The margin is 12 mln.
25 mln of stocks now are worth 20 mln.If you usecthem as collateral they will be 20 mln x80% =16 mln.
Well, you will survive 20% drop, you wil still have about 5 mln of stocks not used as collateral.
Though, I forgot about the interest...
So, summing up, if you have stocks worth 100 mln and made a debt worth 60 mln maximum what you can afford yourself is 20% drop.
If more - you will go bankrupt.
The US stock market grew by e, 5 times since 2008, if I remember correctly.
It dropped by around 20% in autumn 2018, after the Fed started tightening, did it?
I mean you are all doomed in both ways.
If the Fed keeps printing money inflation will gradually turn into hyperinflation which will kill you.
If the Fed starts tightening the stock market will collapse creating a giant wave of margin calls as it was in 2008.
Very simple, there is no way out of current situation.