Prices of Treasury Inflation-Protected Securities (TIPS) with similar maturity dates can be used to measure probabilities of a net decline in the consumer price index over the five-year period starting in early 2011 or the five-year period starting in early 2012. One measure of the probability of deflation for the 2012-17 period ticked up from 11 percent on September 19 to 13 percent on September 26. The deflation probability for the 2011-16 period was 12 percent on September 26, up slightly from 10 percent on September 19.