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They're among the most complex investments in the financial world and a major cause of the economic meltdown: "Derivatives." What are they and why are they are largely unregulated? It's our focus on tonight's The Bottom Line.

We talk to the young founder of Groupon, a new local website that proves there is "strength in numbers" when it comes to getting special deals on products and services.

Has Chicago's Playboy Enterprises lost its luster? Kris Kridel of WBBM Newsradio's Noon Business Hour joins us with the details about big changes coming to the magazine.

Joel and his panel discuss the week's top headlines: Cook County Board President Todd Stroger owes the IRS nearly $12,000; Is Lisa Madigan eyeing a potential Senate run?; lawmakers still wrestling with budget and ethics reforms in Springfield; Chrysler and General Motors closing car dealerships all across the country; major layoffs at Loyola Medical Center; and the Blackhawks skating against the Detroit Red Wings in the Western Conference finals. Guests:

Millions of Americans are wallowing in credit card debt, mostly because of astronomical fees and interest rates. But now Washington is trying to reign in credit card companies for what many consider to be abusive and deceptive practices. It's tonight's focus on The Bottom Line.

As the recession continues, we head to Libertyville, where everything from downtown development to Little League is impacted by a big drop in car sales.

Can President Obama's suitmaker be saved? Kris Kridel of WBBM Newsradio's Noon Business Hour shares the details of the battle to save Chicago's Hartmarx.

Joel and his panel discuss the week's top headlines: Drew Peterson charged with murdering his third wife, Kathleen Savio; Mayor Daley demands furlough days from all city workers; sales tax revolt at the Cook County Board this week; Senate hopeful Alexi Giannoulias caught up in a college savings plan controversy; the distressed Sun-Times eyed by a local bidder; the Blackhawks even things up with the Vancouver Canucks; and Jerry Reinsdorf reportedly part of a group bidding for the Phoenix Coyotes hockey team. Guests:

The so-called "stress tests" of America's largest banks are completed and the results will be made public tomorrow. Preliminary reports say some banks are not as healthy as they should be. Eddie Arruza and his panel discuss the test results on tonight's installment of The Bottom Line.

The popularity of small, artisan beers is growing, and some local entrepreneurs are taking advantage. We show you what's brewing in Chicago. Half Acre Metro Brewing Goose Island

Last week, Chrysler declared bankruptcy and announced plans to suspend production at most of its plants beginning this week. The temporary plant closures are not good news for communities with Chrysler plants, like Belvidere, Illinois. We go inside the Belvidere plant.

A local bidder has emerged for the embattled Chicago Sun-Times. We talk to longtime media observer Wally Podrazik about the latest news in the world of newspapers and local television.

There is a new phenomenon changing the way some technology companies are doing business. We find out about open sourcing and how it's revolutionizing the development of software.

A Chicago-based bank is on life support thanks to bad mortgage lending. Kris Kridel of WBBM Newsradio's Noon Business Hour joins us with the details, plus the rest of the week's business headlines.

Tonight's panel discusses the week's top headlines: The swine flu strikes Illinois; President Obama marks 100 days in office; Chris Kennedy reportedly ponders a Senate race; the local real estate market shows some signs of life; the Bulls force Game 7 against the Celtics after a thrilling triple-overtime victory; and the Blackhawks go deep into the playoffs against the Vancouver Canucks. Guests: