Sources close to the matter had said Glencore the world's largest diversified commodities trader felt it had left "money on the table" with an offer price of 530 pence that valued the company at 36.7 billion pounds ($59.15 billion).

The shares have dropped on the grey market since the offer price was set on Thursday.

At 0708 GMT on Tuesday, the first day of unconditional trading, the shares were changing hands at 520 pence, up 1.2 percent, broadly in line with the mining sector.

COPYRIGHT REUTERS, 2011