As Wyoming and other Colorado River Basin states grapple with ways to keep a river more than 40 million people, agriculture and industry depend on flowing, Wall Street is tapping water scarcity to deliver steep profits. Gary Wockner, director of the group Save the Colorado, said hedge funds and other investors have acquired key parcels of land with water rights. In the early 2000s, Wockner pointed out, you could buy Colorado River water for about $8,000 dollars per acre foot. ...