Major stock indices had a very ugly “Black Friday” as new Covid-19 variant called “omicron” brings new measures and scares investors just a few days before Christmas season. Today, stocks in Europe rebounded and U.S. equity futures rose along with Treasury yields as a semblance of calm returned to global markets while investors reconsidered their worst-case scenarios for the omicron coronavirus strain. Investors are trying to work out if the omicron flareup ends up being a relatively brief scare that markets rebound from, or a bigger blow to the global economic recovery.