⚠️ETFs Apalancados e Inversos: Por Qué NO Son Instrumentos de Largo Plazo (Volatility Decay)
ETFs Apalancados e Inversos: Por Qué NO Son Herramientas de Largo Plazo (Volatility Decay)
Este es un artículo que podría salvar tu cuenta. Los ETFs apalancados (2×, 3×) e inversos (−1×, −2×) parecen un atajo hacia ganancias rápidas. En realidad, contienen una trampa matemática que la mayoría de las personas solo comprende después de perder dinero. Se llama volatility decay.
★ Verdad fundamental: Los ETFs apalancados e inversos están diseñados para lograr su múltiplo únicamente durante UN día. A lo largo de períodos más prolongados, debido al reseteo diario, el resultado se desvía dramáticamente de "2× el índice" — y en un mercado volátil, pierden de forma sistemática, incluso si el índice regresa al mismo valor.
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Cómo Ocurre el Volatility Decay (Ejemplo Concreto)
Tomemos un índice con valor 100 y un ETF apalancado 2× también en 100.
| Día | Movimiento del Índice | Índice | ETF 2× (reseteo diario) |
|---|---|---|---|
| Inicio | — | 100.0 | 100.0 |
| 1 | −10% | 90.0 | −20% → 80.0 |
| 2 | +11.1% (vuelve a 100) | 100.0 | +22.2% → 97.8 |
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