London-based Apax Partners, a major investor in financial services and media, has signed a deal to purchase Bankrate for about $571 million in cash. The Bankrate network of companies includes Bankrate.com, Interest.com, Mortgage-calc.com, Nationwide Card Services, Savingforcollege.com, Fee Disclosure, InsureMe, CreditCardGuide.com and Bankaholic.com. Recent investments by the Apax Partners Media and Financial & Business Services division include: Trader Media, EMap, Cengage Learning, Travelex, Hub International, Global Refund and Azimut. Separately, Bankrate reported preliminary second quarter results which show that total revenue for the second quarter fell 23% year-on-year to $31 million. Net income is expected to be $1.9 million, compared to $4.1 million for 2Q/08. As of yesterday the Apax deal represented a premium of 15.8% over Tuesday’s closing stock price and 18.2% over the average closing price for the previous ten trading days.