Stock futures suggest the S&P 500 could put an end to a three-day losing streak; Roku posts a surprise fourth-quarter profit; Robinhood CEO takes the heat at the GameStop hearing; IBM exploring sale of Watson Health unit.

Here are Tuesday's top research calls, including upgrades for American Eagle and Pioneer Natural Resources, and downgrades for Kroger and Wendy's.

Trade-Ideas LLC identified Portland General Electric (POR) as a new lifetime high candidate

Trade-Ideas LLC identified Portland General Electric (POR) as a new lifetime high candidate

Trade-Ideas LLC identified Portland General Electric (POR) as a new lifetime high candidate

Elon Musk will soon allow Dogecoin to purchase SpaceX merchandise.

The theme park company has opened Guardians of the Galaxy: Cosmic Rewind and not everyone is happy despite the ride getting wonderful reviews.

Aurora is slashing its production capacity as it builds a runway toward positive Ebitda a year from now.

Costco took in $984 million in new membership fee in its fiscal third quarter, helping the bulk retailer top Street forecasts for topline revenues.