I disagree about Buffett pigeonholing MJNA with the others, MJNA covers the entire Ted Williams strike zone. Textiles, gum, insurance, oil and we all know the other 25,000.
As Warren Buffett has said, “We try to exert a Ted Williams kind of discipline." In his book, The Science of Hitting, Ted explains that he carved the stike zone into 77 cells, each the size of a baseball. Swinging only at balls in his "best" cell, he knew would allow him to bat .400; reaching for balls in his "worst" spot, the low outside corner of the strike zone, would reduce him to .230. In other words, waiting for the fat pitch would mean a trip to the Hall of Fame; swinging indiscriminately would mean a ticket to the minors."