Once the balance between 'fundamentalists' and noise traders is breached the market becomes more volatile and creates boom or bust cycles. For example, Amazon.com is now worth over $30 billion, 30 times its predicted revenue this year, despite never making a profit. Lux and Marchesi suggests that the increasing numbers of 'optimistic' noise traders investing in Internet stocks is making the market unstable. As more and more noise traders follow this trend, companies such as Amazon find their share prices pushed far above their true worth.