Wholesale inflation rose in October

(CNN)– It’s getting more expensive to do business in the U.S.

The Producer Price Index rose .3% last month.

That brings it to an annualized increase of 6.5%, the largest in four years.

The PPI is a metric of inflation at the wholesale level.

It measures average price changes for producers and manufacturers.

That’s up the chain from prices consumers see at retailers.

The number is frequently seen as a predictor for what may happen to those prices in future months.