Jim Cramer's Portfolios of the Week

Updated from 6:59 a.m. EDT

Jim Cramer sees tons of problems in the stock market right now, with everything from surging oil prices to crashing emerging markets to the troubled financial sector. But no matter how bad the market looks, Cramer knows there's a bull market somewhere, and it's his job to help viewers find it.

Recently, Cramer found opportunity in biotech stocks, stocks to play off the new Medicare bill and casino stocks to avoid. Here are some Cramer highlights from over the past week as aggregated from his "Mad Money" TV show, the "Stop Trading!" segment on CNBC and his RealMoney blog posts (these blog post links require a RealMoney subscription).

Cramer's Financial Dirty Dozen: Cramer identified a group of companies could cause more havoc to the markets. In a July 2 blog post, he wrote: "Specifically, there are 12 companies that are on my watch list as potential disasters that could wreck the market further. These are companies I have NO CONFIDENCE IN WHATSOEVER, and they must be on everyone's screen. They are what could imperil this market." Cramer's Financial Dirty Dozen include Lehman(LEH Quote) and General Motors(GM Quote).

Cramer's 10 Reasons the Rally Could Last: Cramer noticed some interesting behavior in certain stocks that is signaling to him that the rally could last. In a July 1 blog post, he wrote: "We have now slaughtered ag and steel, which had held up well. That's what happens before we recharge." Cramer's 10 Reasons the Rally Could Last include Apple(AAPL Quote) and KB Home(KBH Quote).

Cramer's Biotech Stock Picks for a Soft Economy: Cramer thinks the biotech sector is the place to be in a bear market. On Monday's "Stop Trading!" on CNBC, Cramer told viewers: "We are seeing the same trade into the highest-growth biotech names that we did in 1990, and the cycle is happening again." Cramer's Biotech Stock Picks for a Soft Economy include Gilead(GILD Quote) and Genentech(DNA Quote).