With all that money going into passive funds, how do you prop up your active managers? At Allianz Global Investors, they’re trying sneakers. Senior executives at the asset management unit of German insurer Allianz SE are touring the firm’s 14 offices globally, handing out white running shoes. The campaign is part of a marketing and branding effort by the 513 billion-euro ($595 billion) firm to emphasize its role as active asset manager, at a time when few investors believe stock pickers are worth the extra fees over low-cost index funds.