The writer is a financial journalist and author of ‘More: The 10,000-Year Rise of the World Economy’
It has been described as the easiest free lunch in investment: diversify your portfolio and you achieve a better trade-off between risk and reward. That still seems true when it comes to the number of stocks that investors own within their domestic market.
But new research by Elroy Dimson, Paul Marsh and Mike Staunton of the London Business School shows it has not always been the case with international diversification.
您已閱讀10%（523字），剩餘90%（4575字）包含更多重要資訊，訂閱以繼續探索完整內容，並享受更多專屬服務。