Sly gallows humor pervades this kaleidoscopic documentary about the frenzied global art market, which, fueled by an influx of international buyers, was estimated at around $58 billion at the time of filming and continues to expand with no end in sight. Director Nathaniel Kahn (My Architect) marshals a lively parade of its players, from those with deep pockets, like Chicago collectors and philanthropists Stefan Edlis and Gael Neeson, to those whose are threadbare, such as painter Larry Poons, an artist who was hot in the 60s and 70s, then fell from favor, and now seems poised for a comeback. At the center is whip-smart Amy Cappellazzo, chairman of Sotheby’s Fine Art Division, a dynamo who stokes commerce by assiduously matching patrons with artists. An ingenious marketer himself, pop art’s reigning rock star, Jeff Koons, introduces his 2-D knockoffs of the great masters, to which he adds gazing balls, three-dimensional reflectors that promote the illusion that owner and object are one.