Glencore, weighed down by a $30 billion debt load, also outlined a new goal to trim borrowings by $5 billion to $25 billion by the end of the year while at the same time targeting net funding of $40 billion. Billionaire Chief Executive Officer Ivan Glasenberg has been shuttering coal, copper and zinc mines in a bid to combat a rout in prices that's sapping profits for the biggest miners. The shares rallied to the highest in more than a week.