Rubin 100 · Daily leaders — ALGM +4.90% / 4004.T -10.80%
October 21, 2026 close: Allegro MicroSystems leads +4.90%, Resonac trails -10.80%. 130/130 constituents covered.
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Rubin 100 constituent single-day returns for October 21, 2026.
Top 3: ALGM +4.90% · COTN.SW +4.69% · MRVL +4.06%.
Bottom 3: 4004.T -10.80% · 0992.HK -9.98% · 6890.T -7.98%.
Coverage: 130 of 130 constituents. Ticker links open the per-stock detail view.
→ closelook.net/indices/rubin/