I just remembered something from years back ......
One of the electricians on the jobsite mentioned that romex had increased in price. He said that it was due to a hard winter. I guess some of the copper mines were in the snow belt. A hard winter shut down production for awhile and the spot price of copper went up.
It's not a foolproof crystal ball look into the future but check out the historical charts for copper and look for the patterns:
Kitco - Spot Copper Historical Charts and Graphs - Copper charts - Industrial metals
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