The moment every investor has been waiting for, the Powell speech at the Jackson Hole Symposium. First though, they had to wait and see what type of print Nvidia (+0.1%) was going the post, and the company did not disappoint. Q2 revenue beat the Street by $2.5b (actual was $13.51b), and they guided Q3 revenue to be $16bn (+/- 2%), also above expectations ($12.5b). But with the stock already up 222% ytd, Nvidia gradually moved lower throughout the session, closing unchanged. Broader indexes did…