Tyco cited strong performance in revenue and operating income. It stated that preliminary results from Q1 had showed that revenues had increased by 12%. Revenue was $4.87 billion, higher than the predicted $4.76 billion. Tyco also raised expectations of earnings per share from a $2.50 to $2.65 range to a $2.60 to $2.70 range. Source: http://www.reuters.com/article/hotStocksNews/idUSN2327383020080123