Basically, your mortgage says you have to maintain N% down. So, if the house price drops enough, you make a balloon payment or the bank forecloses, and sells the house at auction.
Once margin calls start triggering, there's an automatic sell off of whatever asset is impacted, causing more margin calls and a feedback loop.
90% of Britain's pension funds were hours away from being zeroed out by margin calls a few weeks ago. The Bank of England intervened.
It made for some great reading. This is why the UK gov't keeps walking back the mini-budget, and the IMF is making noises usually reserved for failing dictatorships.
The US is below replacement rate on 3rd generation+ families, and would experience an aging crisis like Japan if it were not for immigration. You're 'wide open borders' statement is just a dog whistle.
I get when some small country like switzerland complains.
But what the fuck is going on with the US - you people have a giant country, all of mexico could move in and it wouldn't make a dent!
At the same time, real prices (what is paid to existing homeowners, adjusted for inflation) will decrease due to higher interest rates.
As corrolaries: Real mortgage payments will increase, and property tax revenue will decrease.
So, the banks win, schools, local governments and individuals lose--nothing new there.