This is what you need to know before the opening bell:
1. The U.S. President, in an interview with The Wall Street Journal, said he wouldn't declare China a currency manipulator, following meetings he had last week with his Chinese counterpart, Xi Jinping. Trump had said during his run for president that the Chinese were keeping their currency artificially week.
3. Warren Buffett's Berkshire Hathaway (BRK.A) trimmed its stake in Wells Fargo, according to regulatory documents filed on Wednesday. Berkshire Hathaway withdrew its application to the Federal Reserve to boost its ownership stake in the bank to above 10%, and will instead sell about 9 million shares to keep it below that threshold.
4. Apple (AAPL) has put together a small team of biomedical engineers that are part of a secret initiative, initially envisioned by late Apple co-founder Steve Jobs, to develop sensors that can non-invasively and continuously monitor blood sugar levels to better treat diabetes.
5. United Airlines (UAL) said Thursday it was offering compensation to all passengers on a flight from which a 69-year-old passenger was dragged off the plane by security officers.