In fact, most great investors I know (Warren Buffett, for starters) are technophobes. They don’t own what they don’t understand, and neither do I. - Peter Lynch

Never invest in any company before you’ve done the homework on the company’s earnings prospects, financial condition, competitive position, plans for expansion, and so forth.

Invest in What You Know.

Since the early 1980s, the Berkshire annual reports have informed shareholders of the performance of the holdings of the company and new investments, updated the status of the insurance and the reinsurance industry, and (since 1982) have listed acquisition criteria about business Berkshire would like to purchase. The report is generously laced with examples, analogies, stories, and metaphors containing the do's and dont's of proper investing in stocks.