Warren Buffett's investing strategy: How "Cigar Butt" investments made him millions! Warren Buffett's investing strategy: How "Cigar Butt" investments made him millions! Benjamin Graham taught Buffett to look for companies whose assets were worth more than their stock prices. Karan Dsij / Friday, September 8, 2023 0 843 Article rating: 4.7 He even used it in his first investment partnership, achieving remarkable returns, averaging 31 per cent annually over 12 years. Read more