Copper Aluminium Price Ratio

We had looked at the copper to aluminium price ratio earlier and noted that it had reached a historical maximum. Interestingly the price ratio has more or less less stayed above 4 and recently even moved to 4.3 as can be seen in the following graph. The data has been obtained from OFDP (Open Financial Data Project).

Admittedly, this price development has not been in line with our expectations.