Graphic - Valuations, yields help stocks sustain lead over main street

(Reuters) - As world stock markets end a turbulent six months near record highs, investors appear to be betting heavily that economies will recover quickly from the coronavirus crisis, fuelled by zero interest rates and abundant monetary and fiscal stimulus.Despite the economic ravages of the pandemic, the total market capitalization of global stocks is now 52% of expected global economic output -- the highest such ratio in 25 years.Graphic: Global market cap to GDP ratio -..