Reference Portfolio · Updated
Rubin Momentum
Drift since inception. 1/N at 2025-12-30, no scheduled rebalance — the market does the tilting through price action. Notional 500k USD.
Thesis
Rubin Momentum mirrors the live CL-RUBIN-MW index methodology: equal-weight 1/N allocation across the Rubin Build-Out 100 universe at inception, then pure drift. Names that outperform compound a heavier weight; names that lag shrink. Active momentum tilting is left to the market itself, not to a periodic rebalance overlay.
Inception: 2025-12-30 with $500,000 notional, allocated 1/N across the 102 constituents at their local-currency closing prices, FX-converted to USD at the inception spot rate. Fractional shares permitted.
No scheduled rebalance. The first manual semi-annual rebalance is scheduled for 2026-06-30, which also expands the universe to 125 constituents (the Rubin v2 reconstitution). Until then, the portfolio is shares-locked: gainers grow, losers shrink, the methodology is faithful to the index. The original 21d-Sharpe-monthly Rubin Momentum methodology is retired as of 2026-05-04 — active momentum/sector tilting now lives in the separate rubin-sector-rotation slug, started 2026-05-01.
Composition and per-name attribution below. Live index variant: Rubin Build-Out 100 → CL-RUBIN-MW.
Structure
- Equities125
125 equity positions · US, UK, Taiwan, Israel, Netherlands, Germany, Japan, Switzerland, Singapore/HK, South Korea, Italy, Austria, France, US/Thailand, Finland, US/Germany, Hong Kong/China . Benchmark: Rubin Build-Out Momentum (drift since inception, semi-annual manual rebalance) (CL-RUBIN-MW).
Top Holdings
125 total positions — top 10 by weight shown. Tracker portfolio — prices and constituents from the Rubin index worker.
Related
Closelook C+ Portfolio
Real-time access for founding subscribers
Free readers see this end-of-day snapshot of the top positions. Founding subscribers also get every position with cost basis and per-position P&L, the full trade log in real time as moves happen, and the long-form weekly commentary that explains every change.
- Every position with cost basis, market value, and unrealized P&L
- Real-time trade log (free readers see weekly digest)
- Long-form commentary with the rationale behind every move
- Push notifications when positions open, close, or resize
Methodology & disclaimer
Rubin Momentum is a reference portfolio — it reflects how Thomas Look, author and publisher of Closelook, implements the analytical theses discussed on this site. Position data is updated daily from end-of-day broker exports (Barchart). Benchmark prices come from EODHD.
Reference portfolio, educational purpose only. Not investment advice. Drift-only with semi-annual manual rebalances; small tracking error vs. the live index from price-vendor variations is expected.
Reference portfolio, not investment advice. Past performance is not indicative of future results. Closelook Venture GmbH is a publishing company and does not manage client capital.