OIH

The VanEck Oil Services ETF (OIH) is a fund, not an operating company. It holds shares in a basket of the world's biggest oilfield services firms, names like SLB, Halliburton, and Baker Hughes, that provide the equipment, drilling technology, and support work needed to pull oil and gas out of the ground. OIH doesn't sell anything itself; its value simply rises and falls with the combined stock prices of those service companies, which in turn depend on how much oil and gas producers are spending on drilling and production.