Why Lychee’s Tail

In brief

I began researching my portfolio in early 2026. I wanted a broad foundation, some international diversification, and a limited allocation to technology themes in which I have conviction. The result is Lychee’s Tail: 70% VOO, 10% VXUS, 10% VGT, 5% SMH, and 5% QTUM.

My goal was moderate risk relative to a portfolio dominated by individual stocks or thematic funds. But the result is still an aggressive, 100% equity portfolio. It has no bond allocation, meaningful overlap among its U.S. holdings, and 20% in technology-related or thematic sleeves. I accept those trade-offs because I am pursuing early retirement and currently prioritize long-term growth. That is my personal decision—not a model I expect every investor to copy.

A broad U.S. foundation

I chose VOO for 70% of the portfolio. Vanguard says VOO seeks to track the S&P 500 Index, while S&P Dow Jones Indices describes the index as 500 leading U.S. companies representing roughly 80% of available U.S. market capitalization.

People often summarize the S&P 500’s long-run nominal return as “about 10%,” but that shorthand hides substantial variation and depends on the selected period. Using monthly adjusted prices for SPY as an investable proxy, the 30-year period from December 1995 through December 2025 annualized at 10.25%. That is a historical calculation, not an expected return.

The chart below shows the cumulative result across that period, including the interruptions caused by major market declines. It rebases the starting adjusted price to 0%, so it shows percentage growth rather than the return of any single calendar year.

International diversification

The U.S. market has historically recovered from major downturns, but it cannot eliminate country concentration, valuation risk, or periods in which international markets lead. I therefore allocated 10% to VXUS. Vanguard says VXUS tracks the FTSE Global All Cap ex US Index, covering developed and emerging markets outside the United States.

Ten percent is a deliberately modest allocation, not a market-cap-weighted global position. I intend to increase it gradually through future contributions. The charted history is descriptive only; it does not tell me which region will lead next.

A measured technology tilt

VGT is 10% of Lychee’s Tail—not 20%. The portfolio’s combined technology-related and thematic allocation reaches 20% only when VGT, SMH, and QTUM are counted together.

Vanguard describes VGT as a sector-specific fund tracking U.S. information-technology companies. Its sector classification does not include every company commonly described as “tech”; Amazon and Meta, for example, are classified outside the information-technology sector. That does not make VGT free of mega-cap concentration. It can still be dominated by the largest companies inside its sector, and it overlaps with VOO.

I chose it as a low-cost way to add an explicit information-technology tilt while keeping the sleeve smaller than the broad-market core. Its strong recent history is not, by itself, a reason to expect the same result in the next decade.

The higher-risk tail: SMH and QTUM

The remaining 10% is split equally between SMH and QTUM. These are ETFs, not individual stocks.

VanEck says SMH tracks companies involved in semiconductor production and equipment. Defiance says QTUM provides exposure to companies connected to quantum computing and machine learning. Both sleeves are concentrated bets on narrower industries and themes, so I limit each to 5%.

My thesis is that expanding artificial-intelligence infrastructure may support demand for semiconductors and advanced computing. The unresolved part is whether corporate revenue and productivity gains will ultimately justify the capital being invested. Recent price appreciation does not answer that question, and these holdings can be highly volatile.

What I may consider next

Energy is the only additional sector exposure I am currently considering. The idea is that expanding data centers and other AI infrastructure may increase electricity demand. I have not selected an ETF or added an allocation, so this is a research question rather than a portfolio recommendation.

Before adding anything, I would need to evaluate overlap, concentration, cost, the investment vehicle’s methodology, and what existing holding would shrink. Adding a promising theme without funding it from somewhere else would weaken the portfolio’s target structure.

What could prove me wrong

Lychee’s Tail has clear weaknesses:

• A prolonged U.S. or technology downturn could affect both the core and the thematic sleeves at the same time.
• Ten percent in international stocks may be too small to offset poor U.S. performance.
• No bonds means larger potential drawdowns and no dedicated stabilizing asset for withdrawals near retirement.
• VOO, VGT, and SMH overlap, so the ticker count overstates the portfolio’s diversification.
• The SMH and QTUM theses may fail even if AI adoption continues.

I will review the allocation periodically, but I do not plan to treat short-term performance as a signal to chase whichever sleeve just won. The purpose of writing this down is to make the thesis—and the conditions that would challenge it—visible.

Sources

• S&P Dow Jones Indices — S&P 500 index overview
• Vanguard — VOO fund profile
• Vanguard — VXUS fund profile
• Vanguard — VGT fund profile
• VanEck — SMH fund profile
• Defiance ETFs — QTUM fund profile and index description