If you were wondering what Buffett's second rule is, it's to remember the first rule. If you are willing to incorporate some above-average risk tolerance into your portfolio, read on for a look at two Buffett-backed stocks that have the potential to deliver explosive wins for risk-tolerant investors. With the company valued at more than $51 billion and trading at 25 times expected forward sales, Snowflake (NYSE: SNOW) is the most growth-dependent stock in the Berkshire Hathaway portfolio by some metrics.