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IEO · Analysis updated Nov 10, 2026, 6:00 PM ET
Why is iShares U.S. Oil & Gas Exploration & Production ETF (IEO) stock moving?
IEO closed at 151.13 on Oct 30 and fell about 14% to a 129.73 close on Nov 6. The sharpest day was Nov 4, when it dropped 6.3% to 134.09 on 288,453 shares, roughly twice the average daily volume in the sample. Since Nov 6 the ETF has held in a narrow 128-133 range, and the Nov 9 and Nov 10 sessions traded on lighter volume, with Nov 10 closing at 131.86. No news items or SEC filings were found in the window, so the data offers no company, sector, or macro event to explain the decline. The picture is a technical downtrend with a volume-confirmed drop and early stabilization, but the evidence is thin and cannot show whether the selling is finished.
About iShares U.S. Oil & Gas Exploration & Production ETF
IEO is an iShares (BlackRock) ETF launched in 2006. It tracks the Dow Jones U.S. Select Oil Exploration & Production Index and holds about 50 US oil and gas companies. It is a narrow, non-diversified bet on energy producers rather than the whole energy sector. Even so, roughly 40% of the fund is in refining, marketing and transportation companies, not pure drillers.
How the fund works
The fund holds the stocks in its index, weighted by company size (market cap). It doesn't hold everything in the index exactly; it buys a representative sample instead. As of late 2026, about 60% was in exploration and production companies and about 40% in refining, marketing and transportation. It charges an expense ratio of about 0.37–0.38% a year and pays dividends quarterly. Net assets are roughly $0.9 billion. The fund is concentrated in one industry, and its biggest holdings make up a large share of it, so it tends to swing more than broad-market funds.
What usually moves IEO
- Crude oil and natural gas prices
- OPEC+ supply decisions and geopolitical events
- US drilling activity and producer capital discipline
- Refining margins (crack spreads)
- Global economic growth and energy demand