The document discusses separating stock markets into two portfolios: the "Grail portfolio" which tends not to lose value, and the "Goat portfolio" which tends not to gain value. It provides an example of a Grail portfolio created using stocks from the Dow Jones Industrial Average between 2000-2008 that started at zero value and increased to $11.6 million, outperforming the Dow which lost value over the same period. The document argues this demonstrates the existence of portfolios that provide high returns with near-zero risk, and that its methodology can be used to create investment products guaranteeing capital safety and returns.