At the end of a week in which the

Nasdaq Composite

sank to its lowest levels since last November, we're turning our attention to mutual funds that engage in short-selling.

Short-selling, or shorting, is a tactic for profiting from bad news. In short (pun intended), you borrow securities and sell them, banking on the assumption you'll be able to buy them back later at a cheaper price.

This week's Saturday Screen will sift for mutual funds with the highest percentage of their assets invested in short positions. If the market keeps falling, shorting is one way to make lemonade out of lemons.

Also coming this weekend in Personal Finance Focus:

  • A former securities regulator explains how the law can leave 401(k) investors in the dark.
  • Author and real estate writer Peter G. Miller deconstructs technology-company press releases.
  • We'll bring you the week's top- and bottom-performing mutual funds and the stock of the week in our Weekly Scorecard.

We'll also have columns from

Jim Cramer

,

Gary B. Smith

and more. See you Saturday.