Rubin 100 · Daily leaders — FORM +9.59% / ATS.VI -7.18%
October 1, 2026 close: FormFactor leads +9.59%, AT&S trails -7.18%. 126/126 constituents covered.
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Rubin 100 constituent single-day returns for October 1, 2026.
Top 3: FORM +9.59% · 6488.TW +9.52% · 3436.T +9.08%.
Bottom 3: ATS.VI -7.18% · BE -4.90% · AMKR -3.25%.
Coverage: 126 of 126 constituents. Ticker links open the per-stock detail view.
→ closelook.net/indices/rubin/