I'm not so sure that this kind of internal mechanism can actually help keep the price pegged when these issues usually arise due to pumps on exchanges that lack liquidity. The recent price increase appears to have begun on Upbit, one of only a few exchanges that even offer HBD pairs. The other major listing is Bittrex, which currently has wallets offline again.

The small market for HBDs is too easy to manipulate in either direction, especially when the pairings at the exchanges that carry it are seldom traded. So while this might help with the internal pricing mechanism, it doesn't do much for the more visible external exchange pairings and prices.