I see a lot of misinformation stating that reweights enable bots to drain the PCV. That is not true. Here’s why:
- The PCV always buys FEI below 1.00, and sells FEI at 1.01 (through the bonding curve).
- The PCV accrues ETH when apes panic exit.
- The PCV spends ETH during a reweight, but the amount spent is less than the amount accrued from apes selling FEI below peg.
- This all assumes ETH price does not change. Which is why it is important for reweights to happen soon and often.
You may ask “if arb bots are making money, who’s losing money?”. The answer is FEI sellers who sell below peg. They are the one paying the exit tax, and arb bots are capturing some of it alongside the PCV as it brings the peg back up.
To re-state things – when people sell FEI below peg, the PCV shrinks as it is supposed to, BUT the collateralization ratio goes up because it made a profit buying up FEI below peg when it was originally issued above peg.
Sure, the profit the PCV makes could have been higher if there were no bots, but the only people losing are the FEI sellers below peg.
The reweight mechanism is actually sound. It’s just not responsive enough to the huge discrepancy between real FEI demand and how much FEI there actually is on the market.
The PCV will shrink, but the collat ratio will be higher after reweights.