Valuation is likely a key consideration for Wall Street as well. Occidental's share price is 29% below its peak from earlier this year. The stock trades at a forward price-to-earnings ratio of 12.5 compared to a forward earnings multiple of 14.6 for the S&P 500 energy sector.

For what it's worth, Wall Street is overwhelmingly bullish. Among the 65% of analysts who follow Nvidia, 92% rate the stock a buy and the other 8% rate it a hold ahead of the company's third-quarter earnings report. Not a single analyst recommends selling Nvidia at the present time. Here's what investors should know.

Warren Buffett, the longtime CEO of Berkshire Hathaway, oversees a portfolio of investments that's worth nearly $292 billion. While replicating Buffett's success isn't possible, there are a handful of his investments that are no-brainer buys no matter what type of investments you're looking for.