Its YOUR name on the contract & mortgage with the bank, not Cathay's. So at the end of the day you're responsible for the debt. Negative equity=house worth less than the mortgage you owe the bank. All well & good to say CX is "paying" for it all, but they only do it for 15 years before you revert to the basic allowance of 24K p/m....would be a shame to be stuck in a flat paying it down b/c of negative equity whilst others have moved on to buying their second & third flats all b/c you timed the market wrongly