ION Geophysical’s (IO) YTD (year-to-date) returns were 29.4% until July 19. In comparison, the Energy Select Sector SPDR ETF (XLE) has increased 4.0% YTD. XLE tracks an index of US energy companies in the S&P 500 Index. The VanEck Vectors Oil Services ETF (OIH) witnessed -1.6% YTD returns. OIH tracks an index of 25 oilfield equipment and services companies. ION Geophysical has outperformed XLE and OIH since the beginning of 2018.