Scrap Catalytic Converter prices increase 0.98% over the past week as of August 15, 2013
You may track the changing market prices for Scrap Catalytic Converters by subscribing to the Scrap Catalytic Converter Index
http://www.wrecknet.com/cgi-bin/91.cgi?w=chf:100013&t=composite&cid=100062
If you are interested in tracking market price trends for additional commodities recovered through automotive recycling,
you may wish to subscribe to the Automotive Recycling Composite Index
http://www.wrecknet.com/cgi-bin/composite_prices.cgi?id=100013&num=2
Benchmark grades included in the The Automotive Recycling Composite Index
http://www.wrecknet.com/cgi-bin/composite_prices.cgi?id=100013
The Composite Index provides you with daily updates of the spot market price and allows you to view trend graphs for the past week, month, 3 months, year and past 2 years.
Here is a sample of the format that you see when you subscribe to the composite index
http://www.secondarycommodity.com/price/sample/1month.html
http://www.secondarycommodity.com/price/sample/description.html
This sample is for scrap aluminum from a random day in 2010