The winner of the day is GT Solar (SOLR)

Shares of GT Solar (SOLR) are up 14% today, on their earnings release from yesterday, and they raised guidance for FY 2011.

This comes as no surprise to us, as we've been tracking GT Solar in such articles as 3 Value stocks for DOW 12,000 (FRPT,SOLR,OMN).

Here's more on the news:

Solar equipment maker GT Solar International Inc (SOLR) posted first-quarter earnings that trumped analysts estimates on high demand, prompting it to raise its forecast for fiscal 2011.

For fiscal 2011, the company now expects a profit of 90 cents to $1 a share, on revenue of about $700 million to $775 million.

In May, the company had said it expects to report fiscal earnings at the upper end of its forecast range of 55 cents a share to 65 cents a share, while revenue was projected at the upper end of a range of $550 million to $600 million.

GT Solar said the updated full-year outlook included the effect of its recent buy of sapphire producer Crystal Systems.

For the latest quarter ended July 3, the company posted a net income of $16.5 million, or 11 cents a share, compared with $7.8 million, or 5 cents a share, a year ago.

Quarterly revenue for the Merrimack, New Hampshire-based company skyrocketed 88 percent to $135.2 million.

Analysts, on average, were looking for earnings of 4 cents a share, before items, on revenue of $73.1 million, according to Thomson Reuters I/B/E/S.