Jim Cevallos: I'm always interested to look at their factor baskets. Maybe if you could just describe what Goldman does for people by creating these baskets that people can then trade. What was interesting to me was kind of going into an especially coming out of the election, we had some of these vaccine deadlines coming up. Are we going to get a really good vaccine headline? It turned out to be way the efficacy for the Moderna vaccine was the Pfizer and then the Moderna vaccines were far more than we were even expecting.