This is what you need to know before the market opens:
1. Donald Trump is set to deliver his first speech to a joint session of Congress. Wall Street investors are hoping the president will provide further details on his tax plans and other policy positions in his speech Tuesday evening.
2. Samsung Electronics' (SSNLF) link to a scandal that has gripped South Korea and led to the impeachment of its president deepened Tuesday after authorities formally charged the heir to the company's founder with bribery and embezzlement.
3. Apple (AAPL) has decided to adopt a flexible display for one model of the new iPhone coming out this year and has ordered sufficient components to enable mass production, people familiar with the matter told The Wall Street Journal.
4. AstraZeneca (AZN) shares were marked 1.07% higher at 4,658 pence each by 08:45 GMT, extending a 9.46% gain in the past three months, largely in-line with the 8.9% advance for the Stoxx Europe TMI Pharmaceuticals Index.
