China’s ability to repay its government borrowing has been downgraded by the credit rating agency Moody’s, which said the ripple effects from a crisis in the property sector would undermine efforts to revive its flagging economy. Moody’s warned that Beijing would need to bail out local and regional governments and state-owned enterprises that were struggling with rising debts, hampering efforts to boost investment and growth. The rating agency downgraded its outlook for Chinese sovereign bonds from stable to negative on Tuesday, sending a signal to potential lenders that the risk…