[rwmj]

> But I don't own a fixed percentage of production, I own a fixed number of shares and the number of shares can change. If the number of shares doubles, then my investment is worth half as much.

How is that related to currency changes? That can happen anyway regardless of the currency.

[Dylan16807]

It can happen in other situations, but the fact that it always happens with currency fluctuations is what's important here. When the dollar loses value, everything I own that's anchored to dollars loses value too. "buying a share of productive capacity" implies a counteracting effect, but there isn't one, because the amount of productive capacity represented by each share shrinks too.