> I'm not thinking about that. You're implying that stable means nominally equal from one year to another. So if a beer is 5$ in 2026, stability would mean it will keep being 5$ in 2027, then 5$ in 2030 and so on and so forth (at least if I get your argument right). Correct. > This seems to be entirely unnecessary as far as I can see, especially if it is to be obtained by means of a central bank / planning agency that needs to constantly adjust the money supply. How do you plan financially if prices are not stable. > Computers once had prices hovering around 10000$, whereas now you can get a pretty good one for 400$. Is that unstable? Is that problematic? They're an exception. Food, housing, transport, health are the things that matter. Just check your monthly budget.