> The Wilshire 5000 stock index, for example, actually only includes about 3400-3700 companies now. That amazed me when I heard it recently. The number of tra

> The Wilshire 5000 stock index, for example, actually only includes about 3400-3700 companies now. That amazed me when I heard it recently. The number of tradeable things continues to increase, but most of them are two or three steps removed from real-world production.