The world’s largest private bank is doubling down on exotic strategies to profit from the intensifying meltdown in the synchronized bull market. As Wall Street frets another annus horribilis, UBS Global Wealth is embracing a playbook beloved by hedge funds -- a slew of options trades that bet, for example, on the continued outperformance of U.S. healthcare stocks versus industrials when tensions in commerce sink equities. The $2.4 trillion money manager’s skeleton key to unlock ever-more complex and fitful markets also links the yield curve to the fate of stocks, and the latter with currency moves.