I am not someone who puts a lot of pressure on myself. I love a challenge and live for the big stage of an Olympic Games or World Championships. Some people get nervous for the big events but I look forward to them.

The idea of grit is being able to sustain effort and commitment to goals that take a really long time. That's the part of the equation that sometimes gets overlooked.

That confidence and perseverance can sometimes lead you to keep charging ahead headfirst, when what's really needed is a pause and a course adjustment. I think that's the challenge when strengths get overused.

They should be stress-testing their balance sheets and portfolios under a range of negative scenarios, and have sufficient capital and liquidity to withstand scenarios that are far out on the tail of the distribution of possible outcomes. The stress tests should account for potential bubbles in global asset markets.

Every nation is dependent on every other to shore up the system, and there are few (if any) instances where a country is fully shielded against the default of another.