It's a popular question. I'd like to give a different answer each time to keep people interested.
I think trade actions.... And I call them “actions" with purpose; they're much more than trade tensions. When concrete actions have been taken, we're shooting with live ammo. It is having effects on economies—not just China and the United States, but other bystanders are being affected. So much of the economic growth we've enjoyed over the last 20 or 25 years has been the result of trade integration. That greatly concerns me.
Cyber risk is the other thing that keeps me awake at night. It's a non-economic answer, but that is the thing where every morning you're thankful you didn't get a phone call during the night.