New York Stock Exchange regulators have warned Bermuda bond insurer Primus Guaranty Ltd. that it has breached listing standards, because its average share price was lower than $1 over a period of 30 consecutive trading days. The company now has six months to bring its share price back above $1 — otherwise the NYSE will start suspension and delisting procedures.

Primus, which manages a book of $23 billion in credit-default swaps, has been hard hit by the turmoil on the world markets and posted a $390 million third-quarter loss.