The 20 most important employee benefits stories from the past week.

Cash balance plans are the fastest growing sector of the retirement plan market, with a 20 percent average annual increase in new plans since 2001.

As employees take charge of their own retirements and younger generations learn from the mistakes of baby boomers, the industry has no choice but to adapt to the next generation of retirement plans.

Senior members of Congress, both Democrat and Republican, have signed letters calling for a delay or end to the Labor Department’s effort to rewrite the 5-part retirement plan fiduciary definition that deals with those who sell investment retirement accounts.