Help me - I bought these a month ago - when they were being tipped all over the place. Since then the sector has gone down the swannie - should cut my losses (13%) or hold on for the long haul?

Housebuilder Persimmon said it expected 2018 pre-tax profits to be modestly ahead of current market consensus, having benefited from new developments opened through the year. Total group revenues of £3.74bn were 4% higher as new housing revenues increased by 4% to £3.55bn and legal completion volumes increased by 406 new homes to 16,449 against 16,043 in 2017.