SPTM is an equity ETF from SPDR, while VB is a small-cap U.S. equity ETF from Vanguard. SPTM and VB show limited overlap, with an estimated weighted overlap of 9.97%. They share 955 holdings in the loaded dataset, led by CIEN, LITE, and FIX.
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Quick Answer
SPTM is an equity ETF from SPDR, while VB is a small-cap U.S. equity ETF from Vanguard. SPTM and VB show limited overlap, with an estimated weighted overlap of 9.97%. They share 955 holdings in the loaded dataset, led by CIEN, LITE, and FIX.
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SPTM is an equity ETF from SPDR, while VB is a small-cap U.S. equity ETF from Vanguard. SPTM and VB do not own much of the same portfolio weight. That usually means you are combining different parts of the market, with only a small amount of duplication through names like CIEN, LITE, and FIX.
SPTM is an equity ETF from SPDR, while VB is a small-cap U.S. equity ETF from Vanguard. Neither fund clearly dominates on breadth, so the practical difference is more about weighting, index construction, and cost. SPTM and VB are priced very similarly on expense ratio.
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 2.45% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
Because SPTM and VB are closer in breadth, the better fit usually comes down to index methodology, issuer preference, and cost. SPTM and VB are priced very similarly on expense ratio.
Concentration
The top three shared holdings explain 2.45% of the full overlap score.
That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.
Shared Sector Tilt
Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.
These are the holdings contributing the most to the overlap score between SPTM and VB.
| Holding | Name | SPTM Wt. | VB Wt. | Overlap |
|---|---|---|---|---|
| CIEN | Ciena Corp | 0.09% | 0.38% | 0.09% |
| LITE | Lumentum Holdings Inc | 0.08% | 0.35% | 0.08% |
| FIX | Comfort Systems USA Inc | 0.08% | 0.34% | 0.08% |
| COHR | Coherent Corp | 0.07% | 0.31% | 0.07% |
| EQT | EQT Corp | 0.06% | 0.28% | 0.06% |
| EME | EMCOR Group Inc | 0.06% | 0.46% | 0.06% |
| DOW | Dow Inc | 0.05% | 0.21% | 0.05% |
| NRG | NRG Energy Inc | 0.05% | 0.43% | 0.05% |
| ATO | Atmos Energy Corp | 0.05% | 0.43% | 0.05% |
| JBL | Jabil Inc | 0.05% | 0.37% | 0.05% |
SPTM is an equity ETF from SPDR, while VB is a small-cap U.S. equity ETF from Vanguard. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are CIEN, LITE, and FIX, which appear in both portfolios and push the overlap score higher.
Holding both SPTM and VB can make sense if you want exposure to different sleeves of the market. The overlap is small enough that both funds may still improve diversification.
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A straightforward approach used by portfolio analysts.
For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.
Want the full explanation? Read the methodology page.