Graham was Buffett’s mentor and his first boss. Buffett talks about Graham and his approach to investing in this YouTube video. According to Wikipedia, Buffett credits Graham with giving a sound intellectual investment framework.
Graham recommended three categories of stocks - Defensive, Enterprising and NCAV (or Net-Net) and he developed a set of rules to help investors find value among the stocks in those categories.
Serenity Stocks is a company that has developed algorithms based on Graham’s 17 rules. Their service allows investors to evaluate more that 5,000 U.S. stocks against all 17 Graham rules, adjusting for inflation. Serenity says its screeners let users compare all stocks against each other to help them make the best possible investment decisions.
Anyone can use Serenity’s Classic Benjamin Graham Stock Screener for free at Serenity’s website. An advanced version that allows for more customization is available for $22 a month.