I think that in order to have any chance of actually measuring the value of money, whatever metric is used would have to be something that cannot be sold (because otherwise, when the value of money drops relative to the value of the inflation measure, people will sell the inflation measure to buy money, and vice versa, in order to keep their portfolios balanced). We see it with gold, and with bitcoin, and with stocks, and housing, and the general saying that "during a market crash, everything is correlated".
Of course, that leads to the question of "what would serve as a good proxy for the actual value of currency", and I don't have a good answer to that. CPI is the traditional answer, but I don't think it's a sufficient one because
1. CPI misses out on some of what people care about (e.g. asset prices are actually important in determining what kind of long-term lifestyle people can afford)
2. We want to disentangle "commodities went up because of supply shocks that will resolve themselves" and "commodities went up because money is permanently worth less", to the extent that it is even meaningful to disentangle these things
So yeah, it is entirely possible that the dollar is worth less [relative to what people care about], and also gold is worth less [relative to what people care about], and it is even possible that that is causally downstream of injecting a bunch of dollars into the economy, but I have no idea how one would robustly demonstrate that that was or was not the case. If you have any ideas on that front I'd love to hear them.
Also if you are aware of any assets that are _strongly and reliably anticorrelated_ with most other assets during recessions, I would be interested for much more personal reasons.
Asset prices aren't that important on a day to day basis, what matters more is the cost.
If I have a 300k mortgage over 25 years at 7% that's $2121 a month
If I have a 500k mortgage over 25 years at 2% that's $2120 a month
The "price" doesn't really matter at that scale, it's the monthly payment, which hasn't gone up despite house prices increasing 67%
(More importantly with things constrained by zoning/land availability, the monthly price will be set to take all my spare case, as there's more demand than supply, so prices rise until the demand drops, which means people choosing not to live in that area. In other words the higher the salaries in a given area with fixed supply, the higher the cost of housing - be it mortgage or rent)
On the other hand if my weekly shop goes from $150 to $200, that's a 30% increase, and does make a difference.
Of course, that leads to the question of "what would serve as a good proxy for the actual value of currency", and I don't have a good answer to that. CPI is the traditional answer, but I don't think it's a sufficient one because
1. CPI misses out on some of what people care about (e.g. asset prices are actually important in determining what kind of long-term lifestyle people can afford) 2. We want to disentangle "commodities went up because of supply shocks that will resolve themselves" and "commodities went up because money is permanently worth less", to the extent that it is even meaningful to disentangle these things
So yeah, it is entirely possible that the dollar is worth less [relative to what people care about], and also gold is worth less [relative to what people care about], and it is even possible that that is causally downstream of injecting a bunch of dollars into the economy, but I have no idea how one would robustly demonstrate that that was or was not the case. If you have any ideas on that front I'd love to hear them.
Also if you are aware of any assets that are _strongly and reliably anticorrelated_ with most other assets during recessions, I would be interested for much more personal reasons.