ETF Overlap Checker
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ETF Overlap Checker

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DIA vs TLT Overlap

DIA is an industrials ETF from SPDR, while TLT is a fixed-income ETF from IShares. DIA and TLT show limited overlap, with an estimated weighted overlap of 0%. They share 0 holdings in the loaded dataset, led by very few shared positions.

0.0% overlap
#
0Shared Holdings
OK
Low Overlap

Freshly computed.

Quick Answer

DIA is an industrials ETF from SPDR, while TLT is a fixed-income ETF from IShares. DIA and TLT show limited overlap, with an estimated weighted overlap of 0%. They share 0 holdings in the loaded dataset, led by very few shared positions.

  • 0% weighted overlap across 0 shared holdings.
  • The top three shared holdings explain 0% of the measured overlap.
  • TLT is the broader fund, while DIA is more targeted.
  • The overlap is mostly explained by the top shared positions rather than sector labels alone.
  • Holding both can still add materially different exposure.

Data Freshness

DIA holdings
Jul 18, 2026
TLT holdings
Jul 18, 2026
Overlap computed
Jul 19, 2026
Data source
Financial Modeling Prep

Review the methodology for the overlap formula and refresh policy.

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About These ETFs

ETF A

DIA

State Street SPDR Dow Jones Industrial Average ETF Trust

Issuer
SPDR
Asset class
Equity
Expense ratio
0.16%
AUM
$46B
Inception
Jan 14, 1998

ETF B

TLT

iShares 20+ Year Treasury Bond ETF

Issuer
IShares
Asset class
Fixed Income
Expense ratio
0.15%
AUM
$43B
Inception
Jul 22, 2002

What Stands Out In This Comparison

01

What This Means

DIA is an industrials ETF from SPDR, while TLT is a fixed-income ETF from IShares. DIA and TLT 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 very few shared positions.

02

How They Differ

DIA is an industrials ETF from SPDR, while TLT is a fixed-income ETF from IShares. TLT is the broader fund, while DIA is the more targeted sleeve. TLT has the lower expense ratio, while DIA charges more for its exposure.

03

What Drives The Overlap

The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 0% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.

04

When One May Fit Better

If you want the broader portfolio building block, TLT is usually the wider choice. If you want the more focused tilt, DIA is the narrower expression. TLT has the lower expense ratio, while DIA charges more for its exposure.

Overlap Driver Snapshot

Concentration

The top three shared holdings explain 0% 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.

Top Shared Holdings

These are the holdings contributing the most to the overlap score between DIA and TLT.

These ETFs do not share any holdings in the current dataset.

Why These ETFs Overlap

DIA is an industrials ETF from SPDR, while TLT is a fixed-income ETF from IShares. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are very few shared positions, which appear in both portfolios and push the overlap score higher.

Holding both DIA and TLT 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.

Related Comparisons

AGG vs DIA->AGG vs TLT->BND vs DIA->BND vs TLT->

Frequently Asked Questions About DIA and TLT

What is the overlap between DIA and TLT?+
DIA and TLT currently show an estimated weighted overlap of 0% based on the loaded holdings data.
How many holdings do DIA and TLT share?+
They share 0 holdings in the current dataset.
Is the DIA and TLT overlap high?+
The current verdict is Low Overlap. That means the two ETFs have limited duplication in portfolio weight.
Why do DIA and TLT overlap?+
DIA and TLT overlap because the same large positions appear in both funds. In this comparison, the top three shared holdings explain 0% of the measured overlap score.
Which ETF is broader, DIA or TLT?+
TLT is the broader fund, while DIA is the more targeted sleeve. That does not automatically make one better, but it helps explain why the pair can overlap while still serving different roles.

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How Overlap Is Calculated

A straightforward approach used by portfolio analysts.

Overlap = sum(min(Weight_A, Weight_B)) for each shared holding

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.

Looking for another pair? Start from the homepage or open the canonical URL for this comparison at /compare/DIA-TLT.