Specialist insurer Hiscox said gross written premiums were largely stable in the first nine months of 2014.The firm said gross written premiums amounted to £1.36bn, compared to £1.37bn in the corresponding period of 2013, as a controlled approach in reinsurance was offset by solid growth in insurance lines."Long term investment in our brand and in building our retail business has paid off as we continue to grow particularly in USA, London Market and Europe, while we sensibly reduce our catastrophe reinsurance book," said group chief executive Bronek Masojada.Hiscox shares were up 0.89% to 683.50p at 15:13 on Monday.