$POLAR Bonds ($PBOND) main job is to help incentivize changes in $POLAR supply during an epoch contraction period. When the TWAP (Time Weighted Average Price) of $POLAR falls below 1 $NEAR, PBONDs are issued and can be bought with $POLAR at the current price. Exchanging $POLAR for $PBOND burns $POLAR tokens, taking them out of circulation (deflation) and helping to get the price back up to 1 $NEAR. These $PBOND can be redeemed for $POLAR when the price is above peg in the future, plus an extra incentive for the longer they are held above peg. This amounts to inflation and sell pressure for $POLAR when it is above peg, helping to push it back toward 1 $NEAR.