Billionaire Mario Gabelli dishes on Goldman Sachs, the Trump economy and his top stock ideas

Value investor Mario Gabelli, founder and CEO of Gamco Investors, shared his top stock picks and market views in an exclusive interview with CNBC's Scott Wapner on Tuesday.

On Goldman Sachs: "I don't see any reason to not think it will do quite well over the next five years," he said. "The investment banks and commercial banks ... fundamentals are terrific. The underpinnings are great."

On Viacom: "They have wonderful assets around the world," Gabelli said. "New production has to be turned around. ... I think they will turn it around in two or three years. They'll fill up the pipeline. They'll announce some deals."

He also discussed:

To watch the broadcast interview in its entirety, you must be a CNBC PRO subscriber.

Also, click here to see a video of Gabelli's best words of investment advice over the years.