Published registry · Registry rank 1684 · Portfolio as of 2026-05-31
Columbia Small Cap Index Fund
CSPYX (Columbia Small Cap Index Fund) · CXXRX (Columbia Small Cap Index Fund) · NMSAX (Columbia Small Cap Index Fund) · NMSCX (Columbia Small Cap Index Fund)
The verdict
What the numbers say
91.1% of this portfolio matches the S&P SmallCap 600, which costs $30 a year per $100,000 to own outright. This fund charges $200 a year.
Data provenance
Run fffcd45a-98bb-4e8e-b699-e94626fa3ab3; method closet-index@3.0.0; fund accession 0001410368-26-076625; comparison periods and expense-filing links appear with their figures. Machine capture time: 2026-09-01T09:31:36.244Z.
Computed rule checks
0 warnings · 1 check clear · 2 checks need source inputs
Check clear
· Rule 1
The fund’s filed benchmark and its closest approved index control point to the same comparison.
Methodology rule · visual rules si-visual-explainers@1.0.0
No positive-fee index control is available
· Rule 2
The active-share, filed-fee, or same-index control input needed for this warning is unavailable.
Methodology rule · visual rules si-visual-explainers@1.0.0
No complete licensed window with a filed fee
· Rule 3
No complete licensed window and filed headline fee are available together for this check.
Computed on licensed market-return history · filed fee as of 2026-02-28
Methodology rule · visual rules si-visual-explainers@1.0.0
Filed fees in dollars
SEC-convention illustration
Computed from SEC filings
Assumptions for each dollar figure: $100,000 starting amount · 5.0% annual return · annual compounding · fees deducted annually · 0.01% computed index-control baseline. Methodology.
| Share class and filing | 10 years | 20 years | 30 years |
|---|---|---|---|
| CSPYX0.20% · SEC expense filing · as of 2026-02-28 | $2,921 | $9,422 | $22,794 |
| CXXRX0.20% · SEC expense filing · as of 2026-02-28 | $2,921 | $9,422 | $22,794 |
| NMSAX0.45% · SEC expense filing · as of 2026-02-28 | $6,693 | $21,335 | $51,016 |
| NMSCX0.20% · SEC expense filing · as of 2026-02-28 | $2,921 | $9,422 | $22,794 |
Real trailing windows
Computed on licensed market-return history · published run 363649da-fcfb-4007-87ef-de06de7710ca
Trailing windows use iShares Core S&P Small-Cap ETF (IJR) adjusted-close total-return history through 2026-07-29 and the same filed index-control fee baseline as the convention table. Methodology.
| Share class and filing | 10 years | 20 years | 30 years |
|---|---|---|---|
| CSPYXFiled fee as of 2026-02-28 | $4,695Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $21,668Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
| CXXRXFiled fee as of 2026-02-28 | $4,695Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $21,668Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
| NMSAXFiled fee as of 2026-02-28 | $10,764Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $49,112Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
| NMSCXFiled fee as of 2026-02-28 | $4,695Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $21,668Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
Index-control tracking difference
Annualized fund NAV return minus the matched proxy return. Positive means the fund NAV return was higher over that window.
| Fund NAV class | 10 years | 20 years | 30 years |
|---|---|---|---|
| CSPYX | no exact shared fund NAV/proxy anchors for a full 10-year window | no exact shared fund NAV/proxy anchors for a full 20-year window | no exact shared fund NAV/proxy anchors for a full 30-year window |
| CXXRX | no exact shared fund NAV/proxy anchors for a full 10-year window | no exact shared fund NAV/proxy anchors for a full 20-year window | no exact shared fund NAV/proxy anchors for a full 30-year window |
| NMSAX | no exact shared fund NAV/proxy anchors for a full 10-year window | no exact shared fund NAV/proxy anchors for a full 20-year window | no exact shared fund NAV/proxy anchors for a full 30-year window |
| NMSCX | no exact shared fund NAV/proxy anchors for a full 10-year window | no exact shared fund NAV/proxy anchors for a full 20-year window | no exact shared fund NAV/proxy anchors for a full 30-year window |
These figures are illustrations, not predictions or personalized advice. Returns and fees can differ. Read the research disclaimer.
Change the illustration
Computed from SEC filings
Assumptions for the dollar figures below: $100,000 starting amount; 5.0% annual return; 20 years; annual compounding; fees deducted annually; 0.01% computed index-control baseline. CSPYX SEC expense filing, as of 2026-02-28. Methodology.
| Result | Amount |
|---|---|
| Ending value at baseline | $264,825 |
| Ending value at filed expense ratio | $255,403 |
| Difference attributed to fee drag | $9,422 |
This is an illustration, not a prediction or personalized advice. Returns and fees can differ. Read the research disclaimer.
Largest active differences vs the S&P SmallCap 600
The bars are labeled and repeated in the table; color is not the only signal. Linked company names open Buy Like Buffett’s company record; Sensible Investor does not score stocks.
| Holding | Fund | S&P SmallCap 600 | Difference |
|---|---|---|---|
| Sanmina Corp | 0.83% | 0.00% | +0.83% |
| Semtech Corp | 0.82% | 0.00% | +0.82% |
| iShares Core S&P Small-Cap ETF | 0.72% | 0.00% | +0.72% |
| Viavi Solutions Inc | 0.66% | 0.00% | +0.66% |
| POOL CORP | 0.00% | 0.38% | -0.38% |
| CONAGRA BRANDS INC | 0.00% | 0.35% | -0.35% |
| LIQUIDIA CORP | 0.00% | 0.31% | -0.31% |
| LUMEN TECHNOLOGIES INC | 0.61% | 0.33% | +0.27% |
| JACKSON FINANCIAL INC | 0.43% | 0.16% | +0.26% |
| CAMPBELL'S COMPANY (THE) | 0.00% | 0.24% | -0.24% |
Source and verification
SEC N-PORT filing · filed 2026-07-29 · period 2026-05-31
SEC expense filing · period 2026-02-28
Cite these figures
Each snippet includes the figure’s source-event date and immutable verification URL.
Best-fit active share
Sensible Investor, “Columbia Small Cap Index Fund — best-fit active share,” 8.9% versus the S&P SmallCap 600, fund portfolio as of 2026-05-31; measured against the filed holdings of iShares Core S&P Small-Cap ETF (IJR), as of 2026-06-30. https://sensible-investor.com/registry/cspyx/as-of/fffcd45a-98bb-4e8e-b699-e94626fa3ab3
CSPYX filed expense ratio
Sensible Investor, “Columbia Small Cap Index Fund — filed expense ratio,” 0.20% for CSPYX, as of 2026-02-28. https://sensible-investor.com/registry/cspyx/as-of/fffcd45a-98bb-4e8e-b699-e94626fa3ab3
CSPYX fee per active unit
Sensible Investor, “Columbia Small Cap Index Fund — fee per unit of active management,” 2.24% using the CSPYX expense ratio as of 2026-02-28 and fund portfolio as of 2026-05-31. https://sensible-investor.com/registry/cspyx/as-of/fffcd45a-98bb-4e8e-b699-e94626fa3ab3