Summary
S&P Mid-Cap 400 Index is a stock index: one number that says how a chosen group of companies is doing together. Companies in it: 399. The ten largest make up 7.1% of the index. An index cannot be bought itself; you buy a fund that tracks it, for example MDY.
- Companies
- 399
- Ten largest
- 7.1%
- Rising today
- 172 of 399
- P/E of its companies
- 19.3
- Typical company, 1 year
- +6.7%
What speaks for it
- Average yearly growth over the last ten years: 9.0%.
- The weight is spread out: the ten largest companies make up only 7.1%.
- It is easy to buy through funds: MDY, IJH.
What to watch
Nothing here calls for caution.
An index has no Bulios Score and no Fair Price of its own - both are computed from the results of a single company. The valuation below is counted from the companies that make the index up.
Price
Performance
- 1 month
- -1.0%
- 3 months
- -4.2%
- This year
- +9.4%
- 1 year
- +12%
- 3 years
- +49%
- 5 years
- +31%
- 10 years
- +136%
- Avg. market cap
- $11.8B
- P/E
- 19.3x
- Forward P/E
- 15.7x
- P/S
- 1.5x
- P/B
- 2.6x
- P/FCF
- 15.4x
- EV/EBITDA
- 14.0x
- Dividend yield
- 1.43%
- ROIC
- 8,126.1%
- ROE
- 17.4%
- Gross margin
- 43.3%
- Operating margin
- -82.6%
- Net margin
- -9.5%
- Payout ratio
- 27.6%
- Net debt/EBITDA
- 6.6x
- Bulios Score
- 62
Weighted average of every company of the index (399). Banks and insurers are left out of the gross margin, the ROIC and the EBITDA figures.
Where is it within the last year?
Mid-range- Against the 50-day average
- -3.1%
- Against the 200-day average
- -0.6%
It is 7.9% below its highest and 16% above its lowest of the last year. The long-term trend points down: it is below its 200-day average.
How many companies are rising?
A mixed picture- Rising 172
- Flat 2
- Falling 225
- Above the 50-day average
- 31%
- Above the 200-day average
- 42%
- Up over a year
- 58%
- Typical company, 1 year
- +6.7%
Rising today: 172 of 399 companies. 42% of them are above their 200-day average. Over the last year a typical company of the index changed by +6.7%.
Which companies weigh the most?
Widely spread- 1 OKOkta OKTA +1.4% 1.0%
- 2 FTTechnipFMC plc FTI +0.3% 0.8%
- 3 ATAllegheny Technologies ATI +2.0% 0.8%
- 4 NVnVent Electric NVT -0.3% 0.7%
- 5 UTUnited Therapeutics UTHR +1.9% 0.7%
- 6 ENEntegris ENTG +4.2% 0.7%
- 7 THTenet Healthcare THC -0.3% 0.7%
- 8 XPXPO Logistics XPO -0.7% 0.6%
- 9 USUS Foods Holding Corp. USFD -1.5% 0.6%
- 10 RSReliance Steel & Aluminum Co. RS +1.1% 0.6%
The ten largest make up 7.1% of the index. Companies in all: 399.
Composition by the holdings of MDY as of Oct 18, 2026.
How is it spread?
| Sector | Weight | Today | 1 month |
|---|---|---|---|
| Industrials | 19% | -0.3% | -2.5% |
| Technology | 17% | +1.8% | -2.9% |
| Financials | 14% | -0.7% | -1.8% |
| Healthcare | 11% | +0.3% | -0.3% |
| Consumer cyclical | 10% | -0.1% | +4.9% |
| Real estate | 7.8% | -1.3% | -2.8% |
| Basic materials | 7.3% | +0.2% | -6.1% |
| Energy | 6.0% | 0.0% | +4.2% |
| Consumer defensive | 3.4% | -0.8% | +6.8% |
| Utilities | 3.0% | -1.2% | +4.6% |
| Communication services | 1.6% | +0.6% | +4.3% |
Largest sector: Industrials (19%). Best over the last month: Consumer defensive (+6.8%).
By company size
- Large cap 56%
- Mid cap 44%
- Small cap 0.1%
By the company's market value: Mega cap from $200B, Large cap from $10B, Mid cap from $2B, Small cap from $300M, Micro cap below $300M.
Largest size group: Large cap (56%).
How has it done?
Growing over the long run- A year on average, 10 years
- +9.0%
- Deepest drop
- -24%
- Yearly volatility
- 15%
Average yearly growth over the last ten years: 9.0%. Deepest drop in these years: 24% below the earlier high.
How expensive are its companies?
Usual valuation- P/E of the companies inside
- 19.3
- Average Bulios Score
- 62 out of 100
Weight by Bulios Fair Price
- Undervalued 26%
- Fairly valued 11%
- Overvalued 63%
On average the companies inside trade for 19.3 times their yearly profit. By Fair Price, 63% of the rated weight comes out as overvalued.
Counted from every company of the index (399). Each company counts by its weight. We use the metrics, the Bulios Score and the Fair Price of the companies themselves.
How do I buy it?
Funds that track this index. They differ in where they are domiciled, what they cost and whether they pay dividends out.
| Fund | Domicile | Size | 1-year change | Dividends | |
|---|---|---|---|---|---|
MD MDY State Street SPDR S&P MIDCAP 400 ETF Trust | United States | 0.23% | $25.5B | +12% | Pays out |
IJ IJH iShares Core S&P Mid-Cap ETF | United States | 0.05% | $121.3B | +12% | Pays out |