Index Funds: Everything You Need to Know to Invest Successfully

Reviewed by Diario de un Inversor · UpdatedJune 13, 2026

Our review

Index Funds by Félix López fills a genuine gap in the Spanish-language financial bibliography: a practical, up-to-date guide written from the perspective of the European market that clearly explains what index funds are, how they work, their advantages over active management, and how to start building a portfolio of this type. López combines conceptual rigour with practicality: rather than merely defending indexing in theory, he explains specific providers accessible from Spain — Vanguard, iShares, Amundi — as well as the tax implications of fund transfers under Spanish tax law, an aspect that English-language books in the same genre cannot address. The style is direct, free of unnecessary jargon, and avoids the paternalistic tone that dominates parts of Spanish financial education. The constructive critique is that in 2023, with interest rates significantly higher than in the previous decade, the treatment of fixed income could be somewhat more nuanced. It is, nonetheless, the most complete reference available in Spanish on this strategy.

Key takeaways

• Index funds replicate the behaviour of a market index at minimum cost, without attempting to beat it through active selection.
• The tax advantage of fund transfers in Spain — no tax event until final redemption — is a meaningful argument for domestic investors.
• Global diversification through a single world index fund reduces risk without complicating portfolio management.
• Regular contributions — regardless of market timing — matter more than trying to enter at the perfect moment.

Fact

Published in 2023, it is one of the first Spanish-language books to specifically address the tax advantages of fund transfers under current Spanish tax law.