Data as of Oct 28, 2026.
IWS vs RSP: Differences, Returns & Fees
Over the year to Oct 28, 2026, IWS returned +22.7% to RSP's +16.0%; 46% of their weight is in the same names.
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Net assets on Oct 27, 2026: $15.2bn for iShares Russell Mid-Cap Value ETF and $99.8bn for Invesco S&P 500 Equal Weight ETF.
Pair scorecard
RSP costs 0.03 points a year less; their one-year returns differ by 6.7 points; RSP is 6.6 times larger.
| Measure | IWS | RSP |
|---|---|---|
| Return | ||
| Total return, 1 year | +22.7% | +16.0% |
| Benchmark | ||
| What it tracks | Russell Midcap Value Index | S&P 500 Equal Weight Index |
| Cost and size | ||
| Expense ratio | 0.23% | 0.20% |
| Net assets, as of Oct 27, 2026 | $15.2bn | $99.8bn |
| Holdings | ||
| Holdings in common | 46% | |
| Top ten holdings, share of the fund | 6.8% | 2.7% |
Holdings in common uses holdings dated Oct 27, 2026. Method
Risk and return
May 9, 2003 to Oct 23, 2026 · 1,224 weekly returnsEach against its own benchmark: IWS against IWV, Aug 3, 2001 to Oct 23, 2026; RSP against IVV, May 9, 2003 to Oct 23, 2026.
RSP returned slightly more: +1,085.5% to +1,016.8%. RSP swung slightly less: 18.8% to 19.5%. RSP fell slightly less at its worst: −59.6% to −62.0%.
Full scorecard
19 measures, with how each is measured Open ↓
| Measure | IWS | RSP | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +1,016.8% | +1,085.5% | RSP (slight) | Price change plus distributions, reinvested. |
| Annualized | +10.8% | +11.1% | RSP (slight) | Total return as a yearly rate. |
| Price return | +597.9% | +726.1% | RSP | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 19.5% | 18.8% | RSP (slight) | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 13.8% | 13.2% | RSP (slight) | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −62.0% | −59.6% | RSP (slight) | Deepest fall from a high to the low after it. |
| Upside capture | 100.1% | 104.7% | Share of its benchmark's rise caught in the weeks it rose. | |
| Downside capture | 99.5% | 102.9% | Share of its benchmark's fall taken in the weeks it fell. Lower is better. | |
| Beta | 1.05 | 1.07 | Not an edge | How far it moves for each 1% its benchmark moves. |
| R squared | 0.89 | 0.92 | Not an edge | Share of its weekly moves its benchmark explains. |
| Risk-adjusted | ||||
| Sharpe | 0.53 | 0.56 | RSP (slight) | Return above Treasury bills per unit of volatility. |
| Sortino | 0.75 | 0.80 | RSP (slight) | Return above Treasury bills per unit of downside deviation. |
| Treynor | 0.091 | 0.098 | Return above Treasury bills per unit of beta. | |
| Calmar | 0.17 | 0.19 | RSP (slight) | Annualized return divided by the max drawdown. |
| Against the benchmark | ||||
| Benchmark | IWV | IVV | The ETF each fund is measured against. | |
| Alpha | +0.3% a year | −0.6% a year | Not significant | Yearly return beyond what its beta to the benchmark predicts. |
| Alpha t-stat | 0.22 | −0.57 | Not an edge | How sure the alpha is. Below 2, it could be chance. |
| Alpha range | −2.2% to +2.8% | −2.8% to +1.5% | Includes zero | The 95% range for the yearly alpha. |
| Information ratio | 0.10 | 0.02 | Return against its benchmark per unit of tracking error. | |
| Tracking error | 6.5% | 5.4% | Not an edge | How far weekly returns stray from the benchmark, annualized. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 1,224 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IWS and RSP hold 46% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.
half
46% in common
Only in one fund ↓
Side by side
IWS and RSP on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IWS and RSP are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IWS follows Russell Midcap Value Index and RSP follows S&P 500 Equal Weight Index.
- Holdings in common. 46% of the weight is in the same securities (holdings dated Oct 27, 2026).
- One-year total return. Over 1 year to Oct 28, 2026 IWS returned +22.7% and RSP +16.0% with distributions reinvested, a gap of 6.7 points.
Data as of Oct 28, 2026.
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Over the year to Oct 28, 2026 it returned +22.7% with distributions reinvested, against +13.3% for its benchmark, the Russell 3000 Index.
IWS tracks an index. The prospectus expense ratio is 0.23% a year. By its holdings published by its issuer for Oct 27, 2026, 66% of the fund by weight is stocks the S&P 500 also holds, across 719 positions, with the top ten at 6.8%.
RSP
RSP tracks the S&P 500 equal weight. Over the year to Oct 28, 2026 it returned +16.0% with distributions reinvested, against +13.7% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.20% 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 508 positions, with the top ten at 2.7%.
Questions people ask
- Which returned more over the last year, IWS or RSP?
- In the year to Oct 28, 2026, with distributions reinvested, IWS returned +22.7% and RSP +16.0%.
- Which is cheaper, IWS or RSP?
- RSP is cheaper, by 0.03 percentage points a year. That is about $3 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, IWS against RSP, data as of Oct 28, 2026. https://etfiq.com/compare/any/iws-vs-rsp
ETFIQ. (Oct 28, 2026). IWS against RSP. Retrieved from https://etfiq.com/compare/any/iws-vs-rsp
[IWS against RSP (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iws-vs-rsp)
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