Symetra Financial Corp., a Bellevue, Wash.-based life insurance company, has postponed its IPO, due to “current market conditions.” The company had filed to sell 39.5 million common shares at between $19 and $20 per share. It plans to trade on the NYSE under ticker symbol SYA, with underwriters including Merrill Lynch, Goldman Sachs, JPMorgan and Lehman Brothers. Shareholders include Vestar Capital Partners, Och-Ziff Capital Management, Highfields Capital Management, Caxton Associates, White Mountains Insurance Group and Berkshire Hathaway. www.symetra.com