Investors on the hunt for returns should be seeking out opportunities in fintech, "greentech," "healthtech" and 5G, analysts at UBS said.

In its annual outlook report for the year ahead, the Swiss bank said it expects global economic output and corporate earnings to return to pre-pandemic levels in 2021. As a base-case scenario, this would mean continued fiscal stimulus, low interest rates and a wide-scale vaccine rollout in the first half.