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To: pater tenebrarum who wrote (1120)6/28/2000 10:45:00 AM
From: robnhood  Read Replies (3) | Respond to of 436258
 
I suppose it used to mean that copper would rally to new highs at the end of a bull market, hence putting a copper roof on the market. I think it fits in somewhere with box car loadings, and other ancient paradigm sayings.