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Clean energy ETF performance is increasingly driven by index weighting mechanics and single-stock concentration rather than broad sector fundamentals. Market-cap weighting without rebalancing safeguards amplifies hype-driven volatility.

Impact: Due diligence on rebalancing rules and equal-weight safeguards is essential to mitigate valuation distortions and ensure thematic investments align with stated risk parameters.

— from Navigating Geopolitical Risk, ETF Mechanics, and Post-Buffett Capital Allocation · Leben mit Aktien | Der Podcast für Anleger mit Weitblick· May 06, 2026