What’s happening with XCEL Energy?

Does anyone know what’s going on with XCEL? They recently had a one day drop of $1.80 (3.8%) with no explanation! I’ve been looking for articles or comments all over the internet but can’t find anything. Any Idea’s?
Data & News supplied by www.cloudquote.io
Stock quotes supplied by Barchart
Quotes delayed at least 20 minutes.
By accessing this page, you agree to the following
Privacy Policy and Terms and Conditions.