Accordingly, if NSA CPI is much different from the 217.05 implied by the current price of the Apr-10 TIPS (and ironically, that level matches the economists' forecasts as well), you can expect that bond to move rather sharply. This January number has special implications for the TIPS market. The April 2010 TIPS bond, which matures April 15th with a notional amount tied to an interpolation between the January and February CPI figures, will see half of the uncertainty go away when the Jan print is under our belts.