Charles Schwab's Liz Ann Sonders wasn't surprised by Wednesday's hawkish rate cut from the Fed. She says markets got overextended on hopes of a dovish FOMC, pointing to the pullback in sentiment as one that was needed. On the meeting between President Trump and China's president Xi Jinping, Liz Ann doesn't see substantial traction to "lower the temperature" of trade tensions. She expects markets to experience a "K-shaped" environment where market breadth thins.