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) -- "Weak oil, weak gold and a stronger dollar may have caused your portfolio to take a hit today, but it also allows you to buy great companies at a discount," Jim Cramer told the viewers of his "Mad Money" TV show Tuesday.

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Cramer continued his "Invest In America" series by reminding viewers that down days like today provide the perfect opportunity to buy great companies at a discount. Just like your favorite sweater goes on sale at the store, Cramer said stocks go on sale as well. He explained that great companies aren't doing less great on down days, so why not buy them when they're on sale?

Cramer said great companies, like


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featured on last night's show, have great CEOs, who don't blame commodities or currencies or the weather for shortfalls in their earnings. Instead, he said, great CEOs blame themselves, admit their mistakes and work every day to make their companies better.

So while the markets may worry about commodities, Cramer said investors need to be worrying about which stocks, with great CEOS, they need to be buying them while they're on sale.

Off the Charts

In this regular segment, Cramer went head to head with colleague Dan Fitzpatrick over the chart of


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, a stock Cramer called one of the single best gauges of worldwide commerce.

Using Fitzpatrick's work, Cramer outlined how the transportation stocks have historically been a leading indicator for the global economy. He showed that in good times, the Dow Jones Transports move in lock step with the broader markets, but in times of trouble, like in both 1998 and 2000, the transports topped first, signaling the decline before it happened.

Since the market lows in March, the transportation stocks have once again been in lock step with the broader markets, said Cramer, and have even outperformed the averages by 23%.

Turning back to FedEx, Cramer said Fitzpatrick feels this stock still has room to run, and is not signaling a downturn. But Cramer said in his opinion, the stock to buy is rival


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, which not only has a sizable dividend, but has been lagging behind FedEx. Cramer said UPS is poised to catch up to its sector given its a world-class franchise with a more efficient business model.

Disney's World

Continuing his "Invest In America" series, Cramer sat down with

Walt Disney

(DIS) - Get Walt Disney Company Report

president and CEO Bob Iger for an exclusive interview.

Starting with the economy, Iger said things are better than they were last year. He said sales are not getting worse, which is a good sign, and in some areas, like advertising, there are signs of improvement. At Disney, Iger said the price of commodities and the moods of the markets don't matter as much as creativity, innovation and understanding how to best entertain their customers.

When asked about Disney's recent acquisition of

Marvel Entertainment


Iger said the deal not only provides Disney with a great stable of characters, but also talented people, which is vital to the company's long-term prosperity. Disney now has 18 brands worth more than $1 billion, but Iger noted that movies in particular are more risky than ever with so much competition for consumer's entertainment dollar.

Turning to the jobs front, Iger said he mentioned three challenges at President Obma's recent job summit. They included high corporate tax rates, piracy of intellectual property and tourism getting increasingly more difficult. Iger said all three of these issues are critical to creating more jobs in America.

Finally, when asked about the future, Iger noted that mobile applications are a growing area. He said that mobile will make money eventually, and he's pleased with advertiser interest in the company's recent iPhone application for ESPN. Iger said Disney is maintaining its presence on the big screen, the TV screen and on mobile screens.

Mad Mail

Cramer told a viewer that given a choice between retailers


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TheStreet Recommends

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, he'd choose Costco. He said while he likes Wal-Mart, after spending time with Costco's CEO recently, Cramer said that company has the momentum.

Lightning Round

Cramer was bullish on

Chesapeake Energy

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Devon Energy

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(AAPL) - Get Apple Inc. (AAPL) Report



(INTC) - Get Intel Corporation (INTC) Report


He was bearish on


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Western Digital

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-- Written by Scott Rutt in Washington D.C.

To watch replays of Cramer's video segments, visit the Mad Moneypage on CNBC


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At the time of publication, Cramer was not long any stock mentioned.

Jim Cramer, host of the CNBC television program "Mad Money," is a Markets Commentator for, Inc., and CNBC, and a director and co-founder of All opinions expressed by Mr. Cramer on "Mad Money" are his own and do not reflect the opinions of or its affiliates, or CNBC, NBC UNIVERSAL or their parent company or affiliates. Mr. Cramer's opinions are based upon information he considers to be reliable, but neither, nor CNBC, nor either of their affiliates and/or subsidiaries warrant its completeness or accuracy, and it should not be relied upon as such. Mr. Cramer's statements are based on his opinions at the time statements are made, and are subject to change without notice. No part of Mr. Cramer's compensation from CNBC or is related to the specific opinions expressed by him on "Mad Money."

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