Nasdaq 100 slides most of all on the opening

The US stock markets have just now reopened for live trading and it has been the Nasdaq 100 that has immediately fallen back the most in early trading. Perhaps that makes sense given the moves in US treasury markets this afternoon. The Dow Jones and S+P 500 are lower on the opening too and could soon catch up anyway. The Nasdaq 100 closed last night at 16,830. It just reopened officially at 16,705, but fell towards 16,600 in a heartbeat. So, I doubt you could have sold any on the opening without a robot of some kind. The index has just now fallen below its 21 day moving average as well. That is in place right now at 16,690. The Nasdaq 100 is currently trading at 16,635