The 3 Most Timeless Investment Principles (1 of 3)by Daniel Myers
Always Invest with a Margin of Safety: Margin of safety is the principle of buying a security at a significant discount to its intrinsic value, which is thought to not only provide high-return opportunities, but also to minimize the downside risk of an investment. In simple terms, Graham's goal was to buy assets worth $1 for $0.50. He did this very, very well. To Graham, these business assets may have been valuable because of their stable earning power or simply because of their liquid cash value. It wasn't uncommon, for example, for Graham to invest in stocks where the liquid assets on the balance sheet (net of all debt) were worth more than the total market cap of the company (also known as "net nets" to Graham followers). This means that Graham was effectively buying businesses for nothing. While he had a number of other strategies, this was the typical investment strategy for Graham. This concept is very important for investors to note, as value investing can provide substantial profits once the market inevitably re-evaluates the stock and ups its price to fair value. It also provides protection on the downside if things don't work out as planned and the business falters. The safety net of buying an underlying business for much less than it is worth was the central theme of Graham's success. When chosen carefully, Graham found that a further decline in these undervalued stocks occurred infrequently. While many of Graham's students succeeded using their own strategies, they all shared the main idea of the "margin of safety."