Shares in Ford Motor Company (NYSE:F) now trade for roughly the cost of a gallon of diesel. Is this the time to load up on F stock? Oxford Club’s Horacio Marquez gives his take on the future of the automaker and where investors should best look for profits.

Since March, shares in Warren Buffett’s investment vehicle, Berkshire Hathaway (NYSE:BRK.A, BRK.B), have plunged 23%.

The Class A shares closed Friday at $116,650 each, down from their 52-week high of $151,650 (the Class B shares represent 1/30th of the Class A shares).

However, Money Morning’s Horacio Marquez says Berkshire’s share price is merely a reflection of the slowdown in the US economy. And with shares now at bargain prices, it’s a perfect opportunity to take a stake in one of the best investment portfolios on the planet…

Valero Energy Corp. (NYSE: VLO), the largest independent refiner in the U.S. market, is a well-known and avidly traded name. Despite being a member of the super hot energy sector, Valero has seen its stock price collapse from its 52-week high of $75.75 to Friday’s close at $34.72 (a 54% decline).

Volkswagen AG (PINK: VLKAF), PSA Peugeot Citroen SA (OTC ADR: PEUGY), and Fiat SPA (OTC ADR: FIATY) beat earnings estimates in the last week. At the same time, however, Ford Motor Co. (F), one of the largest industrial companies in America, missed earnings estimates. By a lot.

Chevron Corp. (CVX), the second-largest U.S. oil company, has recently experienced a decimation of its share price: The stock has dropped nearly 20% from its 52-week high of nearly $105 to Friday’s close of $86.05.