Data as of Oct 28, 2026.
IVV vs MDY: Differences, Returns & Fees
Over the year to Oct 28, 2026, IVV returned +13.7% to MDY's +12.8%; 0% of their weight is in the same names.
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Net assets on Oct 27, 2026: $885.1bn for iShares Core S&P 500 ETF and $25.9bn for SPDR S&P MidCap 400 ETF Trust.
Pair scorecard
IVV costs 0.20 points a year less; their one-year returns differ by 0.9 points; IVV is far larger, $885.1bn against $25.9bn.
| Measure | IVV | MDY |
|---|---|---|
| Return | ||
| Total return, 1 year | +13.7% | +12.8% |
| Drawdown | ||
| Below its high | 6.5%, high on Aug 14, 2026 | |
| Benchmark | ||
| What it tracks | S&P 500 | S&P MidCap 400 Index |
| Cost and size | ||
| Expense ratio | 0.03% | 0.23% |
| Net assets, as of Oct 27, 2026 | $885.1bn | $25.9bn |
| Holdings | ||
| Holdings in common | 0% | |
| Top ten holdings, share of the fund | 38.1% | 7.5% |
Holdings in common uses holdings dated Oct 27, 2026. Method
Risk and return
May 26, 2000 to Oct 23, 2026 · 1,378 weekly returnsEach against its own benchmark: IVV against SPY, May 26, 2000 to Oct 23, 2026; MDY against IJH, Jun 2, 2000 to Oct 23, 2026.
MDY returned more: +968.4% to +785.1%. IVV swung less: 17.3% to 20.6%. IVV and MDY fell about the same at their worst: −54.7% and −54.9%.
Full scorecard
19 measures, with how each is measured Open ↓
| Measure | IVV | MDY | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +785.1% | +968.4% | MDY | Price change plus distributions, reinvested. |
| Annualized | +8.6% | +9.4% | MDY (slight) | Total return as a yearly rate. |
| Price return | +453.9% | +682.4% | MDY | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 17.3% | 20.6% | IVV | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 12.3% | 14.5% | IVV | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −54.7% | −54.9% | Tie | Deepest fall from a high to the low after it. |
| Upside capture | 99.3% | 99.9% | Share of its benchmark's rise caught in the weeks it rose. | |
| Downside capture | 99.7% | 100.2% | Share of its benchmark's fall taken in the weeks it fell. Lower is better. | |
| Beta | 0.99 | 1.00 | Not an edge | How far it moves for each 1% its benchmark moves. |
| R squared | 1.00 | 0.99 | Not an edge | Share of its weekly moves its benchmark explains. |
| Risk-adjusted | ||||
| Sharpe | 0.46 | 0.45 | Tie | Return above Treasury bills per unit of volatility. |
| Sortino | 0.65 | 0.64 | Tie | Return above Treasury bills per unit of downside deviation. |
| Treynor | 0.081 | 0.089 | Return above Treasury bills per unit of beta. | |
| Calmar | 0.16 | 0.17 | MDY (slight) | Annualized return divided by the max drawdown. |
| Against the benchmark | ||||
| Benchmark | SPY | IJH | The ETF each fund is measured against. | |
| Alpha | +0.1% a year | −0.2% a year | Not significant | Yearly return beyond what its beta to the benchmark predicts. |
| Alpha t-stat | 0.33 | −0.63 | Not an edge | How sure the alpha is. Below 2, it could be chance. |
| Alpha range | −0.4% to +0.5% | −0.8% to +0.4% | Includes zero | The 95% range for the yearly alpha. |
| Information ratio | 0.00 | −0.11 | Return against its benchmark per unit of tracking error. | |
| Tracking error | 1.2% | 1.7% | Not an edge | How far weekly returns stray from the benchmark, annualized. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 1,378 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IVV and MDY hold 0% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.
half
0% in common
Only in one fund ↓
Side by side
IVV and MDY on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IVV and MDY do different jobs. What does each one do in a portfolio?
- What each follows. IVV follows S&P 500 and MDY follows S&P MidCap 400 Index.
- Holdings in common. 0% of the weight is in the same securities (holdings dated Oct 27, 2026).
- Cost. IVV charges 0.03% of assets a year and MDY 0.23%, a gap of 0.20 points.
Data as of Oct 28, 2026.
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IVV
IVV tracks the S&P 500. Over the year to Oct 28, 2026 it returned +13.7% with distributions reinvested, against +13.6% for its benchmark, the S&P 500. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer for Oct 27, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 505 positions, with the top ten at 38.1%.
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.
Questions people ask
- Which returned more over the last year, IVV or MDY?
- In the year to Oct 28, 2026, with distributions reinvested, IVV returned +13.7% and MDY +12.8%.
- Which is cheaper, IVV or MDY?
- IVV is cheaper, by 0.20 percentage points a year. That is about $20 on $10,000 held for a year. Fees come from each fund's prospectus.
Links are sources, not endorsements. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IVV against MDY, data as of Oct 28, 2026. https://etfiq.com/compare/any/ivv-vs-mdy
ETFIQ. (Oct 28, 2026). IVV against MDY. Retrieved from https://etfiq.com/compare/any/ivv-vs-mdy
[IVV against MDY (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/ivv-vs-mdy)
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