In comparison, the Market Vectors Oil Services (NYSEArca: OIH) and the iShares U.S. Oil Equipment & Services ETF (NYSEArca: IEZ) take a greater emphasis on large-cap names. IEZ has 21.2% in giant-caps and 34.5% in large-caps, while OIH has 20.6% in mega-caps and 47.0% in large-caps. SLB is also the largest holding in both of these ETFs at 21.2% for IEZ and 20.6% for OIH.
SPDR S&P Oil and Gas Equipment Services
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Max Chen contributed to this article.