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Data as of Oct 28, 2026.

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MDY vs USO: Differences, Returns & Fees

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MDY is an equity index fund and USO a commodity futures fund, and over the year to Oct 28, 2026, USO returned +133.3% against +12.8%.

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Net assets: $25.9bn on Oct 27, 2026 for SPDR S&P MidCap 400 ETF Trust, and $1.9bn on Oct 28, 2026 for United States Oil Fund, LP.

MDY on its own →USO on its own →
At a glance
+12.8%
MDY total return, 1 year
+133.3%
USO total return, 1 year
0.23%
MDY expense ratio
0.86%
USO expense ratio

Pair scorecard

MDY costs 0.63 points a year less; their one-year returns differ by 120.5 points; MDY is 13.6 times larger.

MDY vs USO: Differences, Returns & Fees
MeasureMDYUSO
Return
Total return, 1 year+12.8%+133.3%
Drawdown
Below its high6.5%, high on Aug 14, 202682.3%, high on Jul 14, 2008
Benchmark
What it tracksS&P MidCap 400 IndexOil futures
Cost and size
Expense ratio0.23%0.86%
Net assets, as of Oct 27, 2026$25.9bn$1.9bn
Holdings
Holdings in commonnot published
In the S&P 500, by weight0%
Top ten holdings, share of the fund7.5%

Method

Side by side

MDY SPDR S&P MidCap 400 ETF Trust USO United States Oil Fund, LP
Where it sits Stock ETF Commodity ETF
Issuer State Street USCF
What it is Tracks the S&P MidCap 400 Holds oil futures
Total return, 1 year +12.8% +133.3%
Its benchmark over the same days +13.2% (IJH) not measured
Gap to its benchmark −0.4 pts vs IJH not measured
Expense ratio 0.23% 0.86%
Holdings 401 not counted
Net assets, MDY as of Oct 27, 2026 and USO as of Oct 28, 2026 $25.9bn $1.9bn

MDY and USO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

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About each fund
MDY

MDY tracks the S&P MidCap 400. Over the year to Oct 28, 2026 it returned +12.8% with distributions reinvested, against +13.2% for its benchmark, the S&P MidCap 400 Index. The prospectus expense ratio is 0.23% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 401 positions, with the top ten at 7.5%. It sat 6.5% below its high of Aug 14, 2026 on Oct 28, 2026.

USO

USO holds oil futures. Over the year to Oct 28, 2026 it returned +133.3% with distributions reinvested. The prospectus expense ratio is 0.86% a year. It sat 82.3% below its high of Jul 14, 2008 on Oct 28, 2026.

Questions people ask

Which returned more over the last year, MDY or USO?
In the year to Oct 28, 2026, with distributions reinvested, MDY returned +12.8% and USO +133.3%.
Which is cheaper, MDY or USO?
MDY is cheaper, by 0.63 percentage points a year. That is about $63 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
BWET vs MDYMDY vs SLVMDY vs SIVRGLDM vs MDYUSO vs VOUSO vs VXFMOAT vs USOIJH vs USO
Where to next
MDY on its own →USO on its own →Hold both: look the portfolio through →Rankings →MDY dividend history →MDY holdings →Standards and sources →
Sources and dates
MDY filings on SEC EDGAR ↗
State Street website ↗
USCF website ↗

Links are sources, not endorsements. A comparison is not a recommendation.

Cite this pageCitation, APA and Markdown

ETFIQ, MDY against USO, data as of Oct 28, 2026. https://etfiq.com/compare/any/mdy-vs-uso

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