Early Update – Sharp Reversal In Yields Supports S&P $4200

11:52 a.m. ET It’s been a very dynamic and fast moving morning , requiring me to update this post several times. The key driver is the S&P testing $4200 and a sharp drop in 10-year yields. Treasuries surged higher at 9:45 a.m. ET, sending yields lower. I’m not sure of the exact catalyst, but it…