Argentina has the best stock market in the world: +50% every year! Until you realize it's denominated in a heavily inflating currency.pic.twitter.com/pAGbzjTWLG
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They are a hedge only during the initial stages, yes. (Venezuela is likely to get much worse.) But I'm not sure it was due to Volker raising rates that hyper-inflation didn't happen. He stopped the inflation, yes.
But hyper-inflation happens when there is a major loss of confidence in the currency or in the government; it's not just a case of over-supply of currency, like normal inflation. In fact, I can't remember a case when a reserve currency had hyper-inflation.
Even the Roman denarius, which is often given as an example of abruptly debased currency, wasn't really hyper-inflation. There were periods when it wasn't minted at all (deflation?) and people kept hoarding it, despite the debasement.
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