€10 trillion idle: Europe’s overlooked ‘nest egg’ and what to do with it

# The problem in plain terms

Household participation in capital markets is unusually low. The European Central Bank data cited shows only about 4% of households invest a sizable share of their wealth in stocks, bonds, or mutual funds. Around 80% of eurozone households have no direct holdings in those instruments. In Greece the situation is starker: more than 90% of households have no direct investments, with only 4% of depositors owning stocks.

# Why this matters for growth

Banks could be intermediaries in mobilizing this capital, but large parts of the banking sector and retail savers remain wary. Past market shocks—the 1999 stock bubble and the heavy equity losses around the 2010 financial crisis—left memories of loss that reduce appetite for market exposure.

# Practical examples worth copying Two European examples show different routes to higher household participation in markets:

• Finland: Special equity savings accounts helped households access market investments more easily. By the end of 2024, 37% of Finnish households held mutual funds, listed shares, or both. The structure lowered barriers to entry and simplified ownership.

• The Netherlands: A system of mandatory occupational pension funds channels large volumes of private savings into long-term investment. This model increases market participation by tying saving to employment and pensions.

# What reforms would change flows without inflating risk

• European investment accounts with consumer protections, low fees, and clear default options for conservative, balanced, or growth-oriented portfolios.
• Pension-system reforms that expand occupational and personal pension participation, making long-term savings automatic and portable.

• Regulatory incentives for banks and asset managers to design low-cost products that keep liquidity options for households while gradually increasing market exposure.

# Expected outcomes If implemented thoughtfully, these measures can raise household exposure to capital markets while preserving safety for those who need liquidity. More funds channeled into firms and infrastructure could increase financing for technology and productivity-raising investments—helping close competition gaps without forcing excessive risk onto savers.

The opportunity is straightforward: a very large pool of idle capital exists. Converting parts of it into structured, well-governed investment vehicles can improve household returns and supply European businesses with more domestic capital.