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How We Model a $100 Insider-Buying Portfolio (and Why $100)

· 7 min read · By

Every BUY signal we publish opens a hypothetical $100 position. People ask why $100, and why a mock portfolio at all instead of just reporting "the stock went up." The answer is about honesty and comparability — here's the full model.

Why $100, equal-weighted

A fixed $100 per signal means every idea gets the same vote. No position can dominate the record because it happened to be large, and there's no temptation to size up the winners after the fact. Equal weighting is the most honest way to ask one question: does the average signal work?

The point

Equal-weighted $100 positions remove sizing skill from the equation. What's left is the quality of the signal itself.

The matching SPY position

For every $100 signal, we open a matching $100 in SPY on the same day. This is the part most "track records" skip. A signal that returns +8% in a quarter the market returned +12% is not a good signal — it's a bad one dressed up in a green number. Pairing each buy with SPY turns raw return into alpha: performance relative to simply owning the market.

The exit rules

Positions close mechanically, with no discretion:

TriggerAction
Price hits +10%Close at target (win)
Price hits -15%Close at stop loss (loss)
NeitherStay open, marked to current price

The asymmetry (-15% stop, +10% target) is deliberate: insider-buying edges tend to show up as a higher hit rate rather than enormous single winners, so a tighter target with room to avoid getting shaken out early fits the strategy's shape. We test whether that's actually true in our stop-loss vs hold analysis.

Why hypothetical, and what that costs

No real money is traded. That keeps the record clean and reproducible, but it also means the numbers are optimistic: there's no slippage, no commission, no tax, and fills are assumed at the recorded price. Real-world results would be lower. We'd rather state that plainly than pretend a backtest is a brokerage statement.

Where to see it

The model isn't a slogan — it's running live. Every open and closed position sits on the track record, and the 2026 performance report aggregates the whole thing against SPY with an "as of" date. The exact scoring that decides which buys become positions is in the methodology.

None of this is financial advice. It's a transparent way to keep ourselves honest about whether the signals work.

Disclaimer: This content is for educational and informational purposes only. It does not constitute financial advice, investment recommendations, or an offer to buy or sell securities. Past performance does not guarantee future results. Always conduct your own due diligence before making investment decisions. Company names, tickers, individuals, and financial data in illustrative examples may be fictional and created for educational purposes unless linked to a verifiable SEC filing. Analysis is generated using artificial intelligence and may contain errors.

More from the blog

Mid-Year 2026: Did Following CEO Buys Beat the S&P? Jun 16, 2026 Sector Rotation in Insider Buying: Spring 2026 May 28, 2026 Stop-Loss vs Hold: What the -15%/+10% Rules Did to Our 2026 Signals May 14, 2026

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