Is the grammar correct?

Not bad, but you should do something about "little changed." You could write: " . . . to climb as much as 1.1 percent before closing--little changed." Or, you could write: ". . . to climb as much as 1.1 percent before closing; little changed."

But i think it would work best, and be very characteristic of English expression to make it a separate sentence: " . . . to climb as much as 1.1 percent before closing. Little changed."

My Whitesmoke application could find no error in the grammar, but as S pointed out, the sentence is awkward (something a grammar check will almost always miss).

Can you provide a link to the example, Fansy?

This is where you can read the article, the quotation can be found in the 12th paragraph [towards the end of the page ]
http://www.nytimes.com/2007/08/11/business/worldbusiness/11markets.html
Thanks