Succession planning is a tough subject in the hedge fund community, where a firm's investors often go out the door with the firm's founders. But Kenneth Brody and Frank Brosens of Taconic Capital Advisors don't seem concerned. After a remarkable career spanning several decades, Brody, who turned 70 years old in 2013, retired from the multistrategy firm he co-founded in 1999 with Brosens, 56, on January 1, 2014 to focus on philanthropy through non-profit organizations that support troubled youth. Though he has handed day-to-day management of the firm over to Brosens and CIO Christopher DeLong, Brody is still a principal and advisor at the firm. The executives are confident that the firm will continue to thrive. They've strengthened and grown Taconic's investment teams in London and New York and opened an office in Hong Kong in 2012. Assets grew…