I'll cross-post instead of guessing. Another comment here:
> URVs were quoted in cruzeiros reais and its intrinsic value was pegged to three price indices and had a fixed parity of 1-to-1 to the daily U.S. dollar exchange rate. [0]
> The problem with pegging your currency is that you get a disconnect between the official value and the private value. So introducing this new currency which was pegged, and transferring over only once the disconnect was resolved was the stroke of genius.