But even if adequate funding is available, with the longer duration of obligations, the question is whether there are sufficient long-duration assets to hold. These factors can affect financial markets. Regulations requiring closer matching of duration in some countries in Europe have been nominated as one factor (though far from the only one) behind apparently strong demand for long-dated government securities in global markets.
Some European governments have recently issued very long-dated securities – up to 50-year maturities – to tap this demand. There are also proposals to create 'longevity bonds' to help pension providers manage longevity risk. A more daring idea still is  5  That said, some developing countries may, in due course, age quite rapidly.