To Trade or Not to Trade

First they tell us not to trade our investments often and then they say we don't trade enough.   The tone of this Wharton article implied that it was bad not to actively manage your portfolio.  From everything I have studied about investing, I disagree.  You should make smart choices, leave them be and check them a couple of times a year, rebalancing if necessary.

Hands-off: Holders of 401(k) Retirement Accounts Are Not Your Typical Investors - Knowledge@Wharton.