(Reuters) - Tesla's Frankfurt-listed shares rose 12% to a two-week high on Thursday, as a strong sales forecast cheered investors.

CEO Elon Musk on Wednesday forecast vehicle sales would grow by 20-30% next year, reassuring investors Tesla was improving its core electric vehicles business, and reducing concerns about when it could produce a robotaxi.

Its positive update helped lift Nasdaq futures by around 0.5% in early morning European trade.

(Reporting by Danilo Masoni; Editing by Amanda Cooper)