Stocks are weak here as Trump takes center stage at the United Nations and talks tough on trade. Plus, could the FANG become FANGS? One bank thinks so, and it’s our call of the day. And . there’s trouble in the House of Zuckerberg. We’ll explain why the exodus of Instagram’s top execs could be painful for Facebook. Plus, Nike earnings after the bell. We’ll have them for you — live. Catch The Final Round at 3:30 ET p.m. with Jen Rogers, Yahoo Finance markets correspondent Myles Udland and reporter Dan Roberts.