Market Research Data

TLT Correlation & Overlap

Fund Strategy Analysis

iShares 20+ Year Treasury Bond ETF (TLT) is a key instrument in the Long Term Bond category. Data regarding TLT is frequently analyzed by investors planning tax loss harvesting strategies, specifically those seeking to maintain Long Term Bond exposure while navigating IRS wash sale regulations.

Note: This page summarizes historical similarity metrics and does not assess tax treatment or regulatory outcomes.

Top Correlated ETFs

Long Term Bond
SPTL
CORR ≥ 0.99*
>0.99
Correlation
A holdings overlap of roughly 95% suggests that SPTL and TLT maintain aligned market exposure. This metric is frequently used to assess the potential for maintaining economic position while realizing a tax loss.
Overlap: ~95%
Yahoo Finance ↗SPTL Data Coming Soon
VGLT
CORR ≥ 0.99*
>0.99
Correlation
With approximately 90% overlap in holdings, VGLT and TLT exhibit highly synchronized price behavior. This structural similarity is a key data point for tax-loss harvesting research.
Overlap: ~90%
Yahoo Finance ↗VGLT Data Coming Soon
TMF
CORR ≥ 0.95*
95.0%
Correlation
A holdings overlap of roughly <10% suggests that TMF and TLT maintain aligned market exposure. This metric is frequently used to assess the potential for maintaining economic position while realizing a tax loss.
Overlap: < 10%
Yahoo Finance ↗View TMF Analysis →

Note on Overlap: Estimates are based on the most recent publicly disclosed holdings. Leveraged/Inverse products often use swaps resulting in low physical overlap despite high correlation.

Benchmark Similarity: ETFs tracking similar broad-market or sector-specific benchmarks often exhibit extremely high correlation. Investors typically review additional factors such as index methodology when evaluating similarity.

* Correlation calculated using 2-year daily price returns.

Wash Sale Re-Entry Date (Reference Tool)

If you sold TLT at a loss, U.S. wash sale rules generally restrict repurchasing the same or a substantially identical security within 30 days.

*For informational purposes only. Consult a tax professional regarding IRC §1091. This tool calculates the 31st day following a sale.

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What is Correlation?

Correlation measures the historical relationship between two assets. A value of 1.00 (100%) means they move perfectly in sync. For tax loss harvesting, high correlation is generally desired to stay in the market while realizing a loss.

Index Methodology

Under the wash sale rule, "substantially identical" assets are disallowed for loss claims. Many investors argue that ETFs tracking different indices (e.g., S&P 500 vs. Russell 1000) are not substantially identical.

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