A Swiss-based equity fund manager said some investors that bought Volkswagen and Porsche Holding to play a potential IPO boom might be unwinding their positions and switching into Porsche AG, which was trading fairly closely to its IPO price.

Porsche AG shares had risen as much as 5.2% compared to the IPO price of 82.5 euros by 0922 GMT, while Volkswagen and Porsche Holding were last down 3.8 and 7.8%, respectively.

CEO Oliver Blume said he felt very positive about Porsche AG's opening price of around 84 euros, as the sportscar brand listed in Germany's biggest IPO in over 25 years.

(Reporting by Danilo Masoni; Editing by Amanda Cooper)