$USD +7.9% today — what's driving it?

A nearly 8% move on the USD index seems quite substantial for a single day. I'd be looking for a very clear catalyst to justify that, beyond just market noise.

It's interesting to see that kind of move without a clear catalyst. I'm not positioned, but I'm watching to see if this is sustained or just a whipsaw before diving in.

A nearly 8% move on USD in a single day seems off for a major currency, even with current volatility. Is this a specific cross, or are we looking at an index that's behaving unusually? I'd be checking the data source.