Shipping companies are turning to equity markets to fill a growing funding gap, betting that investors hungry for decent returns will provide capital to a sector recovering from its worst downturn since the 1980s. Ship owners ordered large numbers of vessels between 2007 and 2009, just as the global economy sank into crisis. Prospects have brightened in recent months as world trade picks up and the ship glut is absorbed. The industry still faces a multi-billion dollar financing hole after banks…