Immutable verification record
Columbia Mid Cap Index Fund
Run 363649da-fcfb-4007-87ef-de06de7710ca · portfolio period 2026-02-28 · captured 2026-07-29T14:22:09.616Z
This is the permanent record of what our July 29, 2026 data run computed for Columbia Mid Cap Index Fund, and the exact SEC documents every number came from — it exists so anyone can check us.
Current interpretation · methodology 1.5
How to read this prior-run record now
93.9% of this portfolio matches the S&P MidCap 400, which costs $100 a year per $100,000 to own outright. This fund charges $200 a year.
This interpretation is computed under the current methodology and is not inserted into the immutable record below.Cite these figures
Each snippet includes the figure’s source-event date and immutable verification URL.
Best-fit active share
Sensible Investor, “Columbia Mid Cap Index Fund — best-fit active share,” 6.1% versus the S&P MidCap 400, fund portfolio as of 2026-02-28; measured against the filed holdings of iShares Core S&P Mid-Cap ETF (IJH), as of 2026-03-31. https://sensible-investor.com/registry/cmdyx/as-of/363649da-fcfb-4007-87ef-de06de7710ca
CMDYX filed expense ratio
Sensible Investor, “Columbia Mid Cap Index Fund — filed expense ratio,” 0.20% for CMDYX, as of 2026-02-28. https://sensible-investor.com/registry/cmdyx/as-of/363649da-fcfb-4007-87ef-de06de7710ca
CMDYX fee per active unit
Sensible Investor, “Columbia Mid Cap Index Fund — fee per unit of active management,” 3.27% using the CMDYX expense ratio as of 2026-02-28 and fund portfolio as of 2026-02-28. https://sensible-investor.com/registry/cmdyx/as-of/363649da-fcfb-4007-87ef-de06de7710ca
Active share by comparison index
| Index | Active share | Holdings evidence | Identifier match |
|---|---|---|---|
| the S&P MidCap 400 | 6.1% | measured against the filed holdings of iShares Core S&P Mid-Cap ETF (IJH), as of 2026-03-31 | 96.6% |
| the Russell 2000 index | 84.1% | measured against the filed holdings of iShares Russell 2000 ETF (IWM), as of 2026-03-31 | 16.1% |
| the Russell 1000 Value index | 92.5% | measured against the filed holdings of iShares Russell 1000 Value ETF (IWD), as of 2026-03-31 | 75.6% |
| the total US market | 94.8% | measured against the filed holdings of Vanguard Total Stock Market ETF (VTI), as of 2026-03-31 | 99.6% |
| the Russell 1000 index | 95.5% | measured against the filed holdings of iShares Russell 1000 ETF (IWB), as of 2026-03-31 | 83.1% |
| the Russell 1000 Growth index | 98.5% | measured against the filed holdings of iShares Russell 1000 Growth ETF (IWF), as of 2026-03-31 | 26.9% |
| the S&P 500 | 99.8% | measured against the filed holdings of iShares Core S&P 500 ETF (IVV), as of 2026-03-31 | 3.1% |
| the S&P SmallCap 600 | 99.8% | measured against the filed holdings of iShares Core S&P Small-Cap ETF (IJR), as of 2026-03-31 | 0.2% |
Filed expense ratios by share class
| Share class | Expense ratio | Filing period | SEC document |
|---|---|---|---|
| CMDYX (Columbia Mid Cap Index Fund) | 0.20% | 2026-02-28 | Open SEC expense filing |
| CPXRX (Columbia Mid Cap Index Fund) | 0.20% | 2026-02-28 | Open SEC expense filing |
| NMPAX (Columbia Mid Cap Index Fund) | 0.20% | 2026-02-28 | Open SEC expense filing |
| NTIAX (Columbia Mid Cap Index Fund) | 0.45% | 2026-02-28 | Open SEC expense filing |
Match rates
| Fund identifier match | 96.6% |
|---|---|
| the S&P MidCap 400 | 96.6% |
| the Russell 2000 index | 16.1% |
| the Russell 1000 Value index | 75.6% |
| the total US market | 99.6% |
| the Russell 1000 index | 83.1% |
| the Russell 1000 Growth index | 26.9% |
| the S&P 500 | 3.1% |
| the S&P SmallCap 600 | 0.2% |
Fee-drag windows
| Share class | Window | Fee drag | Window dates |
|---|---|---|---|
| CMDYX | 10 years | $4,770 | 2016-07-29 to 2026-07-29 |
| CMDYX | 20 years | $23,049 | 2006-07-31 to 2026-07-29 |
| CMDYX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-26 |
| CPXRX | 10 years | $4,770 | 2016-07-29 to 2026-07-29 |
| CPXRX | 20 years | $23,049 | 2006-07-31 to 2026-07-29 |
| CPXRX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-26 |
| NMPAX | 10 years | $4,770 | 2016-07-29 to 2026-07-29 |
| NMPAX | 20 years | $23,049 | 2006-07-31 to 2026-07-29 |
| NMPAX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-26 |
| NTIAX | 10 years | $10,934 | 2016-07-29 to 2026-07-29 |
| NTIAX | 20 years | $52,246 | 2006-07-31 to 2026-07-29 |
| NTIAX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-26 |
Check it yourself
- Open the fund’s linked SEC holdings filing and, for fees, the linked SEC expense filing in the table above.
- Find each security identifier and portfolio weight in the holdings filing, and the net annual operating expense for the relevant share class in its expense filing.
- Recalculate the comparison using the active-share formula and portfolio rules.
Raw record (JSON)
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