The recovery in the oil industry is attracting some of the most recognized billionaires in money management. : (Bloomberg) -- The recovery in the oil industry is attracting some of the most recognized billionaires in money management. Stanley Druckenmiller’s Duquesne Family Office bought 1.68 million shares in VanEck Vectors Oil Services ETF in the second quarter, the third-biggest addition to its portfolio in the period, a regulatory filing showed Tuesday. It also added the Energy Select Sector SPDR Fund. George Soros’s hedge fund bought energy stocks including Chevron Corp.