Data is the fuel that keeps Wall Street humming along. Unfortunately for investors, the amount of data they have to digest from earnings reports, economic data releases, and Federal Reserve commentary can sometimes be overwhelming. Occasionally, something important can fall through the cracks.

For example, Nov. 14 marked the deadline for institutional investors with at least $100 million in assets under management to file Form 13F with the Securities and Exchange Commission. A 13F provides a concise quarterly snapshot that allows investors to track the stocks, exchange-traded funds (ETFs), and select options that Wall Street's savviest fund managers have been buying and selling.

Although Berkshire Hathaway 's soon-to-be-retiring billionaire CEO, Warren Buffett, is the most-followed

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