Central banks have thrown trillions at Covid-19. What do they have left?

For central banks that already print money to buy assets, so-called helicopter drops could follow -- directly funding state spending with newly created money that's not offset by government IOU

To kick-start a world economy devastated by coronavirus, central banks have delved deep into their toolboxes and unleashed trillions of dollars in stimulus. So what instruments do they have left, should they need to do more?

Imminent pressure has eased after central banks in the United States, euro zone, UK, China and Japan flung around $5 billion at the problem. But the debate on future policy options remains prescient.

"This was the kitchen sink thrown left, right and centre from central banks across the globe. But what's next is super relevant because clearly there is a limit to how much