Factbox: What's left in the tank for the big three central banks?

(Reuters) - The world's top three central banks have deployed an array of weapons to fight the profound economic threat posed by the global coronavirus pandemic, increasingly seen as likely to spur the first outright contraction in the world economy since the 2007-09 financial crisis.Many have also cut interest rates significantly and rolled out new or enhanced measures such as asset purchases, liquidity facilities and hard pledges not to raise rates for a long time.Here is a rundown of some..