[LONDON] THE boom in fixed-income derivatives trading is exposing a hidden risk in debt markets around the world: the inability of investors to buy and sell bonds. While futures trading of 10-year Treasuries is close to an all-time high, bond-market volume for some maturities has fallen a third in the past year. In Japan's US$9.6 trillion debt market, the benchmark note didn't trade until midday on two days last week. As a lack of liquidity in Italy caused transaction costs in the world's third-largest sovereign bond market to jump last month, Lombard Odier Asset Management helped propel an eightfold surge in Italian futures by relying more on derivatives.
The shift reflects an unintended consequence...