Assignment
Client B has a 20 ETH position in the PF_ETHUSD contract that has been liquidated, and 5 ETH of the position could not be liquidated in the order book. Let’s say the mark price for PF_ETHUSD is 2,000 and the zero-equity price for the position is 1,995, meaning that the profit for the assignment would be 0.025%, below the minimum profitability for the assignment.
In order to meet the minimum profitability of 1% for the liquidity provider, the liquidity pool would be used to cover the shortfall.
Client C, who is an assignment program liquidity provider, would see the fill price for their 5 ETH assignment fill as 1,980, resulting in 1% of profitability. The pool would be debited the shortfall amount of the position, which in this case would be 75 USD (15 USD * 5 ETH).
Covered liquidations
Using the previous example, let’s say that the Assignment Program could only fill 4 of the 5 PF_ETHUSD position and there was still 1 remaining. Let’s further assume that the best bid in the order book is 1,970, meaning that Client B would have a balance of -25 USD if filled at that price.
Instead of unwinding the position, the remaining 1 ETH would be liquidated in the order book at the best bid of 1,970, and the pool would be debited 25 USD.