From its discreet headquarters in Zurich, But after years of steady growth, Barry Callebaut is navigating one of its rockiest stretches. The company’s shares have nearly halved over the past two years, hit by soaring cocoa prices, higher financing costs and a leadership shakeup.Today, Barry Callebaut is Switzerland’s most heavily shorted stock, with about a quarter of its free float in the hands of bearish investors. Though shares have rebounded in recent weeks, the volatility has rattled investors, who’ve ...