In an article I wrote last month called "What’s on Your Doomsday List?" I wondered out loud whether the Aug. 2 debt-ceiling deadline would turn into a day of epic economic woe, or whether it would be more like the overhyped Y2K and produce nothing but piffle. If the former, I suggested creating a list of stocks that could become real bargains if the market tanked.

Be greedy when people are fearful
As we all are aware, the market did indeed drop precipitously –-- even without a government default. I may have been off by a couple of days in my timing, but I wasn't wrong about getting a shopping list ready. Here is a recap of what I wanted to buy, how those stocks fared, and what actions I took.

My Doomsday Watchlist

Company

Price, 7/19/11*

Price, 8/4/11**

My Target Prices

My Actions

Johnson & Johnson (NYSE: JNJ) $66.72 $61.84 Mid-$50s Still watching
McDonald's (NYSE: MCD) $86.21 $84.28 Low $70s Not holding my breath
PepsiCo (NYSE: PEP) $68.54 $63.35 $50ish Bought at $63.50 Aug. 1
Coca-Cola (NYSE: KO) $69.32 $65.80 $50ish Still watching
Costco (Nasdaq: COST) $80.81 $76.50 $60s Bought at $76.00 Aug. 2
Berkshire Hathaway (NYSE: BRK-B) $76.29 $70.95 Below $70 Still watching

Source: Yahoo! Finance.
*Original article publishing date. 
**Date of the 4%-plus Dow drop.

What next?
I started writing this the Saturday after S&P took America's credit rating down a notch, exactly what we were afraid would happen if we defaulted. Now, I'm watching the stocks heading further downward.

McDonald's, in particular, has seemed pretty resistant to stock market jitters, so I wasn't holding out hope there for a real bargain. But it's being punished today along with the other stocks in my list. Berkshire is now in my buy territory, and I intend to make a purchase if it's still there in a couple of days, when I am allowed to purchase a stock I write about.

It's probably a good time right now to start making up a shopping list of your own. You can start right now by putting together a Watchlist. Start one for yourself from scratch, or follow along with my list.