https://www.frbsf.org/wp-content/uploads/sites/4/wp2017-25.p...
Why wouldn't you consider an investment something that has a relatively stable value in real terms - at least over a long enough period - and also provides a yield?
- you buy the property that you personally will live in
- you buy some other property and let it out to tenants or businesses
- you are a pension fund, mutual fund, hedge fund, day trader, bank, HFT etc which trades in derivatives based on mortgages
The first two have been going on for centuries at some level. The third only really got going at the point house prices completely disconnected from inflation.
(Btw, not sure if it was implied but the "you" in "you buy some other property and let it out to tenants or businesses" is often a pension fund or mutual fund.)
Housing was never an investment before recent decades, with an emphasis on the housing bubble. Housing tracked inflation for 400 years.
https://thegoldobserver.substack.com/p/amsterdam-real-housin...
edit: the history of US house prices is that they strictly tracked inflation, then with government subsidy right after WWII, housing prices jumped up, then stayed flat at that new level for the next 50 years, then the turn of the millennium happens and housing becomes an investment (after a stock market crash.)