Caterpillar (CAT) inflation adjusted price, is calculated in today's money (today's value of money or today's purchasing power of money)
Caterpillar (CAT) nominal price, is the recorded price of Caterpillar.
Caterpillar inflation adjusted price end of month - May 2013

Caterpillar (CAT) inflation adjusted long term chart.
Caterpillar (CAT) historical chart, 33 years.
Caterpillar inflation adjusted price end of month May 2013 - historical graph

Caterpillar inflation adjusted price end of month May 2013 - Logarithmic scale chart