Swiss commodity trader Glencore's planned $11 billion listing was fully covered on the first day as investors rushed to take part in the mega-float, two sources close to the deal said on Thursday.

Investors have placed orders for all the shares on offer, including a 10 percent overallotment option, the sources said, adding it was too soon to give guidance on where in the indicated 480-580 pence range the shares would be priced.

That range, announced on Wednesday, values the company at 36.5 billion pounds ($60 billion) at the mid-point, below the price some analysts have valued Glencore at.

Demand for Glencore shares will also have been boosted by the fact it will likely be fast-tracked into the blue-chip FTSE 100 index at the end of its first day of trading.

The books are covered on the full deal size, including the greenshoe, said one of the sources. Given the amount of interest we have seen in the transaction, we thought we would be covered pretty early but I think it just reflects ... that the price range was the right price range.

The listing, in which Glencore is looking to raise around $7.9 billion from new shares and $2.1 billion from existing shares, will boost its firepower for deals amid a boom in commodity prices. But it will also push it into the public eye after 37 years as a discreet private company.

Before the start of bookbuilding on Wednesday, Glencore struck agreements with cornerstone investors who will buy around 31 percent of the total offer, one of the largest cornerstone books to date.

The largest investor, Abu Dhabi's IPIC Aabar, which has already committed $850 million to the listing, also plans to invest an additional $150 million in the offering.

Citigroup, Credit Suisse and Morgan Stanley are the joint global coordinators for the offer, joined by another 20 banks in lower ranking syndicate roles.

Glencore was not available for comment.

(Additional reporting by Clara Ferreira-Marques; Editing by Kirstin Ridley and Dan Lalor)