Own America · position 8 of 11

Own America, but no more than the world already gives you

Should the US get an extra helping beyond its weight in a global fund?

Stay invested — don't add Keep an existing exposure, but commit no new money

Hold what a global fund already gives you. A separate S&P 500 or Nasdaq holding on top of that is a concentration decision, and the cost of money argues against making it now.

−100 · argues against 0 argues for · +100
Data coverage: 4/4 inputs (100%) — at least 75% of the declared inputs are available; this does not measure research support or agreement
Research status: Conflicts with own history — reviewed 2026-08-12, method v1.6.1.

The job Own America

Concentrated in the market that has driven most of the world's returns and now carries most of the world's valuation risk.

The argument

A global fund is already roughly two-thirds American. Buying an S&P 500 fund alongside it is therefore not diversification — it is a deliberate bet that America beats everywhere else by more than it already does.

The case against making that bet today is the price of money. Real ten-year yields at 2.63% hit long-duration assets hardest, and the American index is the longest-duration equity index in the world: a large share of its value sits in profits expected many years out. Nothing in the readings says sell. They say this is not the moment to concentrate.

If you do want the exposure, the Nasdaq version concentrates the same bet further into technology. That is a stronger version of the same decision, not a different one.

Track record How this call changed

DateFromToEvidence captured
2026-08-07 Baseline Stay invested — don't add 4 tests · 4 known

See the complete call track record →

Decision history Primary series, thresholds, and the call

S&P 500

The index level is shown against the same 200-observation trend test used by the stance engine.

7,706 index
2025-06-16 2026-09-23 7,925 index 5,566 index
S&P 500 200-day average ±2% no-flap band Stay invested — don't add band

The trim condition is compound: the index must be below this band while high-yield spreads are above 6pp.

What would change this. Real ten-year yields back below 2.2% would move this to accumulate. A high-yield spread above 6pp with the index below its 200-day average would move it to trim.

Shaded stance bands begin only at the first recorded stance-log entry. Earlier calls are not reconstructed.

Evidence What produced this stance

The stance is a starting point produced by arithmetic, not by an opinion. Every reading behind it is printed below with its value and where the value came from; if you disagree with a reading, the stance it produced is worth disagreeing with too.

Base stance: hold · Experimental house rule the standing policy before today’s readings

A country or regional overlay is an active concentration choice around an already diversified core.

Limit: The hold base and every tilt size are house policy. The app has no user portfolio weights, so it cannot know whether a displayed holding diversifies or duplicates what is already owned.

US 10-year real yield 2.63% LIVE argues against push -2 · -25.0 score pts

America's market is the world's most expensive on most measures, and expensive markets are the ones most damaged by a high discount rate. This test carries double weight here for that reason.

Inputs: us.rates.10y_real Rule: < 2.2% supports; > 2.5% argues against with double weight
Conflicts with own history mechanism established · threshold house-rule · internal record contradictory

A higher real discount rate lowers the present value of distant cash flows and raises the return available from inflation-protected government debt.

Limit: No primary source found validates 2.2% or 2.5% as an equity or gold trading boundary. The project's one historical >2.5% episode moved opposite the declared Nasdaq consequence, so this rule must not carry a call by itself.

US equity earnings yield minus real bond yield +1.54pp DERIVED no push push 0 · 0.0 score pts

Only 1 of 60 monthly vintages exist, so no percentile is invented. Until five years accumulate, wide level bands apply: above 3pp supports, below 1pp argues against.

Inputs: us.equity.excess_yield Rule: With ≥60 monthly vintages: > 75th percentile supports, < 25th argues against; before then: > 3pp supports, < 1pp argues against
Mixed evidence mechanism supported · threshold house-rule · internal record not-tested

The spread is a rough comparison between equity cash-flow yield and the real government-bond alternative.

Limit: It is not a complete equity-risk-premium model. The 1pp/3pp bands and five-year percentile cutoffs are house rules and have no published validation here.

Volatility index 14.2 LIVE argues for push +1 · +12.5 score pts

No stress being priced.

Inputs: us.vix Rule: < 20 supports; > 28 argues against
Mixed evidence mechanism established · threshold house-rule · internal record not-tested

VIX is a rules-based measure of near-term volatility implied by S&P 500 options, not a forecast of market direction.

Limit: 20 and 28 are editorial risk bands, not Cboe thresholds. Low volatility is not an official all-clear and high volatility is not by itself a sell signal.

S&P 500 versus its 200-day average +7.1% vs 200-day average DERIVED argues for push +1 · +12.5 score pts

More than 2% above trend supports owning the market; more than 2% below argues against adding. Inside the ±2% dead-band the reading is deliberately neutral so the call does not flap around the average.

Inputs: us.equity.spx Rule: > +2% supports; < −2% argues against; ±2% is neutral
Research-supported mechanism supported · threshold house-rule · internal record not-tested

Medium-term trend following has published historical support across asset classes.

Limit: The cited work studies a 10-month moving average. FINDASH's 200-day proxy and ±2% no-flap band are implementation choices, not thresholds validated by that paper.

What would change this. Real ten-year yields back below 2.2% would move this to accumulate. A high-yield spread above 6pp with the index below its 200-day average would move it to trim.

The flip is named in advance on purpose. A stance that can only be explained after it changes is a story; a stance that names its own reversal beforehand can be held honestly, and can be checked later against what actually happened.

The score is the strength of the argument among the evidence that is currently available, from −100 to +100. It is not a forecast, a probability or an expected return. Anything between −30 and +30 is a genuine shrug and leaves the stance where it started.

Data coverage says only how many declared inputs exist today. It is not confidence, research strength or agreement among inputs. A reading that cannot be computed is shown as unavailable and counts for nothing — it is never quietly scored as neutral.

Exact score: Score = sum of known pushes (0) ÷ known-test ceiling (8) × 100. At +30/−30 the base stance moves at most one rung.

How Reaching this from Thailand

The routes are the ways this is actually reachable from Thailand. They are not equivalent. The same fund bought through a Thai broker and through an offshore account attracts different tax, different limits and, in one case, a US estate tax exposure that has nothing to do with the fund itself.

Thai brokerage A normal Thai share-trading account

Buys anything listed on the SET, in baht, with no money leaving the country. The simplest route and the one with the fewest tax surprises.

What to ask for What it is Ccy Ongoing charge Why this one
SP50001 DR on S&P 500
The five hundred largest US companies, in baht, without a US brokerage account.
THB S&P 500 in baht through a Thai brokerage account, no offshore transfer needed.
Frictions: dr_wht, dr_structure, fx_thb
NDX01 DR on Nasdaq 100
The hundred largest non-financial companies on Nasdaq — technology-heavy by construction.
THB Nasdaq 100 in baht. A more concentrated version of the same bet, not a diversifier.
Frictions: dr_wht, dr_structure, fx_thb

Offshore broker An international broker account

Wider choice and lower fees, but the money leaves Thailand, which brings in the outward-investment limit, the remittance rules on the way back, and — for US-listed funds — US estate tax.

What to ask for What it is Ccy Ongoing charge Why this one
CSPX iShares Core S&P 500 UCITS ETF (Acc)
The five hundred largest US companies, in an Irish wrapper that keeps them out of the US estate tax net.
USD 0.07% The Irish-domiciled S&P 500 fund at 0.07% — generally outside U.S. situs for this holding.
Frictions: ucits_dividend_leak, fx_thb, remittance, bot_outward_limit

Not this version

The same exposure, structured in a way that costs more than it saves. Listed so the difference between the right idea and the right implementation is visible.

VOO Vanguard 500 Index Fund ETF Shares 0.03% and highly liquid, but U.S.-situated. Check the aggregate Form 706-NA threshold before choosing it for a Thai-domiciled investor.

Instrument details were verified against issuer and exchange pages on 2026-07-25. Tickers, ongoing charges and listing lines change; confirm before dealing. Where a charge shows as the published figure could not be confirmed and none is invented here.

Friction What this costs regardless

The frictions are the parts that cost money or attention regardless of whether the argument is right: tax, transfer limits, deadlines, structure. For most people most of the time they matter more than the market reading does.

Depositary receipts — 10%, and a trap if you claim relief

tax
A DR's dividend is taxed 10% in Thailand, on top of whatever the foreign country already took — and claiming that foreign tax back forfeits the Thai exemption.

Royal Decree No. 775, effective 16 August 2023, sets a 10% withholding on the 'money equivalent to dividends' paid on a depositary receipt, and exempts that amount from personal income tax provided the withholding was at most 10% AND the holder does not claim a refund or a tax credit for it. That last condition is the trap: a holder who tries to reclaim foreign tax withheld on the underlying share loses the Thai exemption on the whole amount. The 10% stacks on top of foreign withholding at source. No source quantifies the combined leakage, so none is stated here.

Verified 2026-07-25 · https://www.set.or.th/en/market/product/dr/overview

You spend baht

structural
A foreign asset can rise in its own currency and still lose you money in baht.

Every unhedged foreign holding is two bets: the asset and the exchange rate. Over a decade the exchange rate mostly washes out; over the two or three years in which someone actually needs the money it frequently does not. This is not an argument against foreign assets — it is an argument for keeping the money you will spend within five years in the currency you will spend it in.

Verified 2026-07-25 · https://www.bot.or.th/en/statistics/exchange-rate.html

Context The other ten positions