Just been looking into XES and honestly it's an interesting play if you're into energy sector exposure. So it's this oil and gas equipment services ETF that's been around since 2006, tracks the S&P Oil & Gas Equipment & Services index with a modified equal weight approach. The thing that caught my eye is the expense ratio at 0.35% - pretty reasonable for what you're getting, especially if you want free or low-cost diversified exposure to energy infrastructure plays. Holdings are concentrated though, only about 31 stocks, with Patterson UTI Energy taking up like 5% of the fund. Top 10 holdings make up nearly half the portfolio. Performance-wise it's been solid recently - up 54.1% in the past year as of early March, though it's definitely volatile. The fund trades between $52.84 and $114.17 over the last year, so there's some real swings. Beta of 0.96 means it moves pretty much with the market, but that 34% standard deviation shows it's a high-risk bet. Total assets are around $442 million which is decent sized. If you're looking at XES as a free or cheap way to get energy sector exposure without picking individual stocks, it works. But worth comparing to IEZ and OIH if you want alternatives - they've got different index methodologies and IEZ is actually cheaper on fees. Not for everyone, but worth considering if energy is your play.