10 things you need to know before the opening bell

10 things you need to know before the opening bell

Here is what you need to know.

1. Trump's national security adviser suggests Iran has been 'choked off' by sanctions, but Trump says he 'couldn't care less' if Iran wants to negotiate. "Will be totally up to them but, no nuclear weapons and 'don't kill your protesters,'" the president tweeted.

2. 'Inequality in a nutshell' “” Alexandria Ocasio-Cortez says the Dow's record high is meaningless for many Americans. "The Dow soars, wages don't," the New York congresswoman commented after the index passed the 29,000 mark for the first time.

3. These are the unusual, colorful slides that mattress startup Casper is using to convince IPO investors that it can capitalize on the $432 billion 'sleep economy.'  Lossmaking Casper suggested it could expand its user base to include travelers, children, babies, and pets.

4. Stretched tech stocks leave some investors seeking off-ramp. Advanced Research Investment Solutions, which manages $13 billion in assets, has diversified away from stocks by investing in funds providing income through healthcare royalties, private real estate investments, and other assets.

5. Lululemon raises quarterly forecast after upbeat holiday sales. The athletic-apparel retailer lifted its net revenue and profit forecasts.

6. The WeWork debacle has unicorn investors seeking cover. More than a dozen Silicon Valley