MID vs SPY
MID vs SPY
American Century Mid Cap Growth Impact ETF vs State Street SPDR S&P 500 ETF Trust
Quick Verdict
SPY has a lower expense ratio. SPY delivered stronger 1-year returns. SPY offers more diversification with 503 holdings.
Side-by-Side Comparison
| Metric | MID | SPY | Winner |
|---|---|---|---|
| Expense Ratio | 0.45% | 0.09% | |
| AUM | $100M | $789.1B | |
| Dividend Yield | 0.15% | 1.01% | |
| Holdings | 39 | 505 | |
| YTD Return | +5.76% | +13.79% | |
| 1Y Return | +4.70% | +23.66% | |
| 3Y Return (annualized) | +13.48% | +21.40% | |
| 5Y Return (annualized) | +3.08% | +13.37% | |
| Volatility (annualized) | 20.5% | 15.3% | |
| Max Drawdown | -40.1% | -56.5% | |
| Fund Family | American Century Investments | State Street Investment Management | |
| Category | Equity | Equity | |
| Inception | Jul 15, 2020 | Jan 22, 1993 |
MID vs SPY Performance
American Century Mid Cap Growth Impact ETF (MID) is a ETF from American Century Investments and State Street SPDR S&P 500 ETF Trust (SPY) is a ETF from State Street Investment Management. Over the past year MID returned +4.70% while SPY returned +23.66%. Year to date, MID is up 5.76% versus a gain of 13.79% for SPY.
Over three years, MID compounded at +13.48% per year against +21.40% for SPY; over five years the annualized figures are +3.08% and +13.37% respectively. Across the full 6-year window we track, MID has the edge at +9.64% annualized vs +8.85%. Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
MID has been the more volatile fund, with annualized monthly volatility of 20.5% compared with 15.3% for SPY. 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 -40.1% for MID and -56.5% for SPY. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.
The two funds' monthly returns correlate at 0.84. They usually move together, but the gap leaves some room for diversification.
Fees and Cost Over Time
MID charges 0.45% per year while SPY charges 0.09%. On a $10,000 position that is $45 vs $9 annually, a gap of $36 per year that compounds over a long holding period. On income, MID currently yields 0.15% against 1.01% for SPY.
Holdings Overlap
MID and SPY share 15 holdings out of 522 unique holdings combined, representing a 1.3% weight overlap.
Moderate overlap means holding both could provide meaningful diversification benefits.
Top Shared Holdings
| Stock | Weight in MID | Weight in SPY | Difference |
|---|---|---|---|
| MPWR | 5.47% | 0.10% | 5.37% |
| JCI | 4.91% | 0.13% | 4.78% |
| CDNS | 4.76% | 0.16% | 4.60% |
| TRGP | Pro | Pro | Pro |
| CMG | Pro | Pro | Pro |
| HUBB | Pro | Pro | Pro |
| HLT | Pro | Pro | Pro |
| VST | Pro | Pro | Pro |
| VRT | Pro | Pro | Pro |
| RSG | Pro | Pro | Pro |
See all 10 holdings MID shares with SPY Exact weights in each fund and the difference, for every overlapping position. X-ray my whole portfolio$99/yr Pro · 7-day refund | |||
Frequently Asked Questions
Which is cheaper, MID or SPY?
MID has an expense ratio of 0.45% while SPY charges 0.09%. SPY is the cheaper option. On a $10,000 investment, that is $36 per year of difference.
Which performed better, MID or SPY?
Over the past year MID returned +4.70% vs +23.66% for SPY, so SPY leads on 1-year performance. Over the longest common window we track (6 years), MID annualized +9.64% vs +8.85% for SPY. Past performance does not guarantee future results.
Which is riskier, MID or SPY?
MID has been the more volatile fund at 20.5% annualized versus 15.3% for SPY. Worst drawdown: MID -40.1% vs SPY -56.5%.
Should I hold both MID and SPY?
MID and SPY have a monthly-return correlation of 0.84, so combining them can provide real diversification depending on your allocation goals.
What is the holdings overlap between MID and SPY?
MID and SPY share 15 common holdings with a 1.3% weight overlap. Combined, they hold 522 unique securities.
Which pays a higher dividend, MID or SPY?
MID yields 0.15% while SPY yields 1.01%, so SPY currently pays the higher dividend yield.
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