Houston oil field services co. at risk of NYSE delisting

The New York Stock Exchange has warned Houston-based Superior Energy Services Inc. (NYSE: SPN) that the oil field services company’s exchange listing is at risk.

The NYSE requires listed companies to maintain a 30-day average stockholders’ equity of at least $50 million, something Superior Energy has failed to do, according to a filing with the U.S. Securities and Exchange Commission. The company has 45 days to tell the NYSE how it plans to get itself back inside the exchange’s listing standards,…