Size · smallest 100 of the Top 1000 by market value (after Banz 1981) · long/short
Smaller listed companies earn a premium over larger ones. Disputed since the 1980s; included as a test. Fundamentals are point-in-time: only figures filed on or before each rebalance are used. Falsified if it does not beat the equal-weight benchmark after 10 bps costs.
Forward tracking started 2026-10-13. Results appear after 21 trading days.
Backtest
| Metric | Strategy | Benchmark |
|---|---|---|
| CAGR | -0.50% | 6.97% |
| Volatility | 8.82% | 18.69% |
| Sharpe | -0.01 | 0.45 |
| Max drawdown | -38.29% | -38.63% |
| Turnover (per year) | 1.69 |
Deflated Sharpe: 0.00 (n trials: 404) — the probability the Sharpe ratio is real after the number of variants tried.
Fundamentals and survivorship: Fundamentals (log_mcap) are point-in-time (filed on or before each date) and cover 65% of the eligible names on average. Names without SEC fundamentals, mostly companies that later delisted, are never selected; an equal-weight portfolio of only the covered names returned +2.45% a year versus all eligible names, which is the survivorship bias this backtest may carry.
Spec
{
"costs_bps": 10,
"end": "2025-12-31",
"rebalance": "M",
"side": "long_short",
"signal": {
"ascending": true,
"field": "log_mcap",
"type": "factor"
},
"start": "2011-01-01",
"top_n": 100,
"universe": "top1000"
}Fork this strategy
Re-run it with your own changes. The fork is computed on the server and linked back here.
curl -X POST https://api.finzdata.com/v1/hub/s/size-smallest-100-of-the-top-1000-by-market-value-after-banz-435aa0/fork \
-H 'Authorization: Bearer YOUR_KEY' -H 'Content-Type: application/json' \
-d '{"changes": {"signal": {"lookback": 126}}}'Or ask your AI assistant (Claude, ChatGPT, Cursor with the FinzData connector):
Fork the FinzData strategy size-smallest-100-of-the-top-1000-by-market-value-after-banz-435aa0 and test it with a 126-day lookback and 20 bps costs, then compare both runs.
Community
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