BOSTON (MarketWatch) — Sometime this year your 401(k) quarterly statement will arrive, as usual, in your mailbox. What won’t be usual, however, is what’s inside the envelope or email. That’s because the quarterly statement will feature not just the usual mumbo jumbo that you’re accustomed to reviewing (or not), but a whole lot more.

Under a new Labor Department regulation that goes into effect this year, sponsors of retirement plans will be required to disclose detailed information about plan features, investment options, and fees and expenses to participants, beneficiaries, and even workers who are eligible to participate in a plan but don’t. The Labor Department will not, however, require that sponsors of retirement plan, your employer, provide a decoder ring with all that new information. So, allow us to fill in the void. Full Story