CAT reports this information each month, giving YoY results for the prior three months on a rolling basis.
The bearish report caught investors off-guard insofar as CAT reported strong 1Q14 results on 4/24/14 and raised 2014 non-GAAP EPS guidance to $6.10 (from $5.81).
As a bellwether industrial, CAT was part of the reason for the weak broad market today.