IVV vs MMID
iShares Core S&P 500 ETF vs MFS Active Mid Cap ETF
Which is better, IVV or MMID?
Large Cap Blend against Mid Cap Blend.
IVV has a lower expense ratio. IVV led over 1Y and the full window. MMID is less concentrated, with 16.0% of the fund in its ten largest positions against 38.1%.
MarketXLS is not an investment adviser. This comparison is generated automatically from market data and is for information only. A Best mark means the better reading on that one measure, not a recommendation to buy.
Side-by-Side Comparison
| Metric | IVV | MMID |
|---|---|---|
| Expense Ratio | 0.03%Best | 0.59% |
| AUM | $882.6B | $34M |
| Dividend Yield | 1.06% | 0.68% |
| Holdings | 508 | 106 |
| YTD Return | +13.60%Best | +6.73% |
| 1Y Return | +16.32%Best | +7.23% |
| 3Y Return (annualized) | +23.81% | - |
| 5Y Return (annualized) | +14.03% | - |
| Volatility (annualized) | 12.7% | 10.8%Best |
| Max Drawdown | -8.9% | -7.9%Best |
| $10,000 over 1 years | $11,736Best | $10,800 |
| Top 10 Weight | 38.1% | 16.0%Best |
| Fund Family | iShares by BlackRock (US) | MFS Investment Management |
| Category | Equity | Equity |
| Style | Large Cap Blend | Mid Cap Blend |
| Inception | May 15, 2000 | Sep 24, 2025 |
Volatility and max drawdown, and the $10,000 over 1 years row, are measured over the window both funds cover: Sep 24, 2025 to Oct 2, 2026 (1 years).
IVV vs MMID growth
Month-end closes. Both lines start at 0% in the first month shown, so the gap between them is the difference in growth across that window. The full view covers the 1 years both funds cover.
IVV vs MMID Performance
iShares Core S&P 500 ETF (IVV) is an ETF from iShares by BlackRock (US) and MFS Active Mid Cap ETF (MMID) is an ETF from MFS Investment Management. Over the past year IVV returned +16.32% while MMID returned +7.23%. Year to date, IVV is up 13.60% versus a gain of 6.73% for MMID.
Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
IVV has been the more volatile fund, with annualized monthly volatility of 12.7% compared with 10.8% for MMID. Lower volatility generally means a smoother ride, though it often comes with lower long-run returns.
The deepest peak-to-trough decline in our data was -8.9% for IVV and -7.9% for MMID. Drawdown depth is what each fund did in the worst stretch of the window measured above.
The two funds' monthly returns correlate at 0.47. They move together some of the time, and apart the rest.
Fees and Cost Over Time
IVV charges 0.03% per year while MMID charges 0.59%. On a $10,000 position that is $3 vs $59 annually, a gap of $56 per year that compounds over a long holding period. On income, IVV currently yields 1.06% against 0.68% for MMID.
Holdings Overlap
2.8% of IVV's money is in holdings MMID also owns. 56.5% of MMID's money is in holdings IVV also owns.
The two portfolios partly overlap.
55 positions in common, counted across the 505 positions we hold weights for in IVV and 104 in MMID, against full books of 508 and 106.
What only one of them owns
Our book lists 38 positions for MMID that do not appear in our book for IVV (33.4% of the fund), and 443 for IVV that do not appear in MMID (96.5%).
Some of those will be the same company recorded under a different code in one of the two books, so the real difference in what you would own is no larger than this and may be smaller. We do not name the individual positions here for that reason.
Top Shared Holdings
| Stock | Weight in IVV | Weight in MMID | Difference |
|---|---|---|---|
| GPNGlobal Payments Inc. | 0.03% | 1.86% | 1.83% |
| FANGDiamondback Energy, Inc. | 0.06% | 1.75% | 1.69% |
| VLOValero Energy | 0.18% | 1.63% | 1.45% |
| WATWaters Corp. | 0.06% | 1.70% | 1.64% |
| BDXBecton Dickinson And Co. | 0.07% | 1.65% | 1.58% |
| AAgilent Technologies Inc | 0.06% | 1.49% | 1.43% |
| GWWWw Grainger Inc. | 0.08% | 1.44% | 1.36% |
| WABWestinghouse Air Brake Technologies Corp. | 0.07% | 1.45% | 1.38% |
| MTBM&T Bank Corp | 0.05% | 1.33% | 1.28% |
| STE:IESteris Plc Ordinary Shares | 0.03% | 1.33% | 1.30% |
56.5% of MMID is already inside IVV.
You probably hold more than these two. Add the rest and see how much of the whole book is the same companies twice.
Free for up to 10 holdings. No account needed.
Frequently Asked Questions
Which is cheaper, IVV or MMID?
IVV has an expense ratio of 0.03% while MMID charges 0.59%. IVV is the cheaper option, by $56 a year on a $10,000 investment.
Which performed better, IVV or MMID?
Over the past year IVV returned +16.32% vs +7.23% for MMID, so IVV leads on 1-year performance. Over the longest common window we track (1 years), IVV annualized +17.36% vs +8.00% for MMID. Past performance does not guarantee future results. This is information, not a recommendation.
Which is riskier, IVV or MMID?
IVV has been the more volatile fund at 12.7% annualized versus 10.8% for MMID. Worst drawdown: IVV -8.9% vs MMID -7.9%.
Should I hold both IVV and MMID?
IVV and MMID have a monthly-return correlation of 0.47, so their returns are far enough apart for the mix to behave differently from either one alone. This is information, not a recommendation.
What is the holdings overlap between IVV and MMID?
56.5% of MMID's money is in holdings IVV also owns. 56.5% of MMID's is in holdings IVV also owns. They hold 55 positions in common, counted across the 505 positions we hold weights for in IVV and 104 in MMID.
Which pays a higher dividend, IVV or MMID?
IVV yields 1.06% while MMID yields 0.68%, so IVV currently pays the higher dividend yield.
Is MMID better than IVV?
IVV has a lower expense ratio. IVV led over 1Y and the full window. MMID is less concentrated, with 16.0% of the fund in its ten largest positions against 38.1%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.