Countrywide Financial, which may have capitalized on the 2002-03 originations boom more than any other mortgage company, expects to continue expanding in the post-refi market. During an investor briefing last week, company officials said they expect Countrywide’s servicing portfolio to grow to $650 billion by the end of the year – which would amount to a 16 percent gain over the second half of 2003. Based on data compiled by Inside Mortgage Finance, an