Bond Investing issues
Challenhing lifecycle investing
Professor Scott Cedarberg These finance professors have looked at historical data in many different stock and bond markets and they've discovered that over the long term there's a significant problem with bond investing. It's simply not profitable enough. In many cases, it's not enough to cover inflation. And in the vast majority of scenarios, you would get a better result by just putting a 100% of your money into stocks.
Professor Scott Cederburg’s research challenges traditional lifecycle investing by arguing that an all-equity, globally diversified portfolio, rather than a mix of stocks and bonds, is optimal throughout an entire lifespan. Based on historical data from 1890-2023, this strategy aims to maximize wealth and retirement consumption, significantly outperforming conventional age-based, bond-heavy glide paths.
Key Findings and Arguments: 100% Equity Strategy: Cederburg challenges the standard advice to diversify with bonds and reduce risk with age. Evidence suggests that for long-term investors (e.g., 30-year+ horizons), an all-equity portfolio provides higher returns and better protection against inflation.
International Diversification: The research emphasizes investing in globally diversified stocks to avoid relying solely on the domestic market. Critique of Age-Based Shifts: The traditional "glide path" of moving from stocks to bonds as one ages is considered inefficient. Cederburg’s findings suggest investors can, and should, hold a high-equity allocation even near or during retirement to ensure the portfolio keeps growing.
Historical Data Analysis: The study uses a comprehensive dataset (1890–2023) from 39 developed countries, using a block bootstrap approach to simulate long-term investment outcomes rather than assuming normal returns. Wealth Generation: The research indicates that shifting to an all-equity approach could yield significant, potentially trillions of dollars in, welfare gains for savers.
Critical Considerations: Behavioral Risks: While statistically superior on paper, an all-equity portfolio requires investors to have the emotional capacity to handle severe, long-term market drawdowns.
Higher Correlations: Some critiques suggest that, in modern markets, global assets are more highly correlated, which may reduce the diversification benefits compared to what was observed historically.
