100 xUSD. This is subject to change via governance proposals. The reasoning is that a bad actor could spam vaults and fill xBacked with junk vaults quite cheaply. This would slow down liquidators monitoring legitimate vaults, and decrease overall health of the protocol.
110%) then it is liquidated. In this case, your vault will be liquidated back to
120%and you will be left with the remaining vault collateral & xUSD.
125%) a redemption will still happen.