AUD, CAD and NZD notable losers against the USD, albeit the ranges are not large.

Yen is better bid also.

EUR, GBP are a touch weaker but not a lot in those really.

Apart from what has been posted there is no fresh news. Its difficult to pinpoint a specific catalyst so its a fall back onto the usual suspects - coronavirus cases and hospitalizations are worsening globally, and continuing tightening of restrictions.