Extremely concentrated long duration bond exposure with high interest rate sensitivity and elevated downside risk
Report created on May 10, 2024Risk profile
5/7
Diversification profile
1/5
Positions
-
ED Vanguard Extended Duration Treasury Index Fund ETF Shares
EDV - US9219107094 100.00%
The portfolio is completely concentrated in a single ETF that holds long‑duration government bonds. With 100% in one instrument, there is no diversification across asset classes, issuers, or interest‑rate profiles. That makes portfolio behavior highly dependent on changes in long‑term interest rates. When rates fall, this kind of exposure can rise sharply; when rates rise, the impact can be painful and fast. Such a single‑focused structure can work for a very specific thesis, but it is fragile if conditions change. A more resilient approach usually mixes different bond types and some growth assets so that no single risk dominates outcomes.
Growth
Historically, a $1,000 investment in this portfolio since 2016 would have fallen to about $725, implying a negative Compound Annual Growth Rate (CAGR) of about -3.2%. CAGR is like the steady “average speed” per year over the whole journey. Over the same period, broad US and global markets grew strongly with double‑digit CAGRs. The maximum drawdown, or worst peak‑to‑trough fall, was almost -60%, far deeper than the roughly -34% seen in the benchmarks. This shows that the portfolio has delivered both lower returns and higher downside, highlighting how sensitive long‑duration bonds have been in a rising rate environment.
Asset classes
- Bonds 100%
All capital is allocated to bonds, specifically extended‑duration government securities, with no exposure to cash, equities, or alternatives. Asset classes behave differently across cycles: bonds often provide income and some stability, while equities drive long‑term growth. Here, bond risk is not the usual “defensive” flavor; long‑duration bonds can be extremely sensitive to interest‑rate changes, behaving more like a high‑volatility asset than a stabilizer. Compared with more typical growth‑oriented mixes that combine stocks and shorter‑term bonds, this structure leans heavily on one type of fixed‑income risk. Blending in other asset classes usually helps smooth the ride and can improve the balance between growth potential and drawdowns.
True holdings
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SP SP Plus Corp 0.97%
Part of fund(s):- Vanguard Extended Duration Treasury Index Fund ETF Shares
-
S SentinelOne Inc 0.02%
Part of fund(s):- Vanguard Extended Duration Treasury Index Fund ETF Shares
- Top 10 total 0.99%
This breakdown covers the equity portion of your portfolio only.
Look‑through analysis only captures a tiny fraction of underlying holdings here, since just the ETF’s top positions are considered and, for this fund, that coverage is minimal. The tool picks up small allocations to names like SP Plus Corp and SentinelOne, but these are likely technical artifacts rather than genuine economic exposures, as the ETF itself tracks government bonds rather than equities. Because bond ETFs often don’t show up meaningfully in equity‑focused look‑through tools, hidden concentration in this case is less about individual issuers and more about duration and interest‑rate risk. The main takeaway is that the real concentration risk is structural, not stock‑specific.
Factors
Factor exposure here is dominated by a very high tilt toward yield and low volatility, with a very low tilt to value. Factors are characteristics, like ingredients, that drive how investments behave over time. A strong yield tilt means the return profile leans heavily on interest income, which can be attractive for income‑seekers but may bring interest‑rate sensitivity. The very high low‑volatility score reflects the typical behavior of high‑quality government bonds over long history, though recent rate spikes have challenged that perception. The very low value score suggests limited alignment with traditional “cheap versus expensive” metrics used for stocks. Overall, performance is expected to be driven mainly by income and rate movements, not classic equity value themes.
Risk contribution
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Vanguard Extended Duration Treasury Index Fund ETF Shares
Weight: 100.00% 100.0%
Risk contribution shows how much each holding adds to the overall ups and downs of the portfolio. With only one ETF at 100% weight, that fund naturally contributes 100% of the risk. There is no internal offset from other holdings, so volatility and drawdowns are entirely governed by this one position. In more diversified setups, a 10% holding might still drive 25% of risk if it is especially volatile, flagging the need to review sizing. Here, the implication is straightforward: any desire to adjust risk must involve either reducing this position, shortening duration, or pairing it with assets that behave differently when rates move.
Dividends
- Vanguard Extended Duration Treasury Index Fund ETF Shares 5.00%
- Weighted yield (per year) 5.00%
The ETF currently yields around 5%, which is a meaningful level of income. Dividends and interest can form a large part of total return, especially when price performance is weak or volatile. For income‑focused approaches, a yield this high is attractive, but it comes with a trade‑off: duration risk. If rates rise further, capital values can fall more than the income received, at least over shorter horizons. Conversely, if rates decline materially, both income and capital appreciation can work together. Using income alone as a comfort blanket can be risky; it’s important to consider whether the underlying price swings are acceptable relative to the cash flow generated.
Ongoing product costs
- Vanguard Extended Duration Treasury Index Fund ETF Shares 0.06%
- Weighted costs total (per year) 0.06%
The fund’s ongoing fee, or TER, is just 0.06%, which is impressively low and compares very favorably with most actively managed products. Costs compound just like returns do, so keeping fees down leaves more of the yield and any price gains in the investor’s hands. This cost profile is a genuine strength of the setup and aligns well with best practices for long‑term investing. While low fees cannot rescue a weak strategy, they reduce the drag and make any chosen exposure more efficient. If the long‑duration bond stance is intentional, it’s being implemented in a cost‑effective way that supports better net outcomes over time.
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