MGIC Investment Corp.’s (MTG) third-quarter loss of $4.44 per share was wider than the Zacks Consensus Estimate of a loss of $1.64 per share. Last year, the company had reported a loss of $1.06 per share. Increasing delinquent inventory and consequently higher incurred losses drained the results.   The company’s loss stood at $971 million from $788.3 million reported for the same period last year, primarily due to an increase in delinquencies. Net underwriting and other expenses were $59.1 million as compared to $62.4 million reported for the same period last year.   Total revenues were $413.3 million, compared with $461.6 million in the third quarter last year. Net premiums written were $278.3 million, compared with $365.0 million for the same period last year. New insurance written was $4.6 billion, compared to $9.7 billion in the third quarter of 2008. Investment income was $75.5 million, down 3.9% year ...