Risque de concentration des marchés : les portefeuilles sont-ils plus exposés ?
Market Concentration Risk: Are Portfolios More Exposed Than They Appear?
41%
of the S&P 500 is driven
by just 10 stocks
If you own an index fund, you're far less diversified than you think
9 pts
more index weight
than earnings share
Those 10 stocks are priced for future dominance — not current profit
1 in 8
S&P 500 CEOs
changed in 2025
When the leader changes, the investment thesis changes with them
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