The naive valuation of a stock that gives it an infinite value at a real 0% interest rate relies on an infinite horizon. Thankfully at least for residential loans it's difficult to get an interest-only mortgage -- in practice deposits and principal payments are binding constraints on valuations. Maybe that changes with corporate landlords becoming more prevalent, though.
> employment stability
This is interesting: high job turnover is usually seen as a sign of a healthy labour market because it can represent people sorting into jobs they're better suited for. I guess it's a question of what you hold constant: maybe people are changing jobs because jobs are plentiful. If people keep changing when jobs are hard to find things could get dicey.
1) newJob pays more than oldJob
2) oldJob is becoming unstable, toxic, and will likely be firing us all in 6 months, so better to leave early and start the clock over
In a world where we remain at oldJob til the end, we risk 6 months of that extra pay differential, plus we now have to job hunt while technically not being employed
Bringing this back to shaker8's point about financial risks, I think these kinds of job changes mostly point to systemic resiliency, not fragility.
But imagine if the US job market changed to this scenario: still the pay is high, still the expenses are low, still the jobs are available, but you have to change jobs every week. That would signal two things:
1) Employers are suddenly finding it advantageous to rid themselves of workers on short notice
2) Time and money are being wasted interviewing people and onboarding them rather than letting them work for sustained periods
I think such a system, while still "healthy" because workers are still employed and paid similarly, is "less healthy" than a system where the workers can expect the duration of their work at one employer to be longer than 1 year
it can just be a plain bubble even if everyone buying it has enough money to afford it. there’s been plenty of bubbles that didn’t involve leverage or loans at all. people simply got crazy and paid ridiculous amounts for assets far above intrinsic value. and when at some point something happens to the asset, it has a far way to fall.