US investors are showing a healthy appetite for short term structured products (those sporting less than two years between strike and maturity dates). But, for the first time since 2003, according to the SRP database, investors are also showing interest in longer term structured notes (those with tenors of greater than six years), creating a barbell effect across maturity levels. Year-to-date (to 9 September 2010), almost 48% ($16.6bn) of all dollars ($34.8bn) invested in US structured products