With AAPL's stock price up another 1.5-2% today, we thought it instructive for all those index traders, hedgers, arbitrageurs, and market prognostictors to comprehend the scale. 90% of the move in the NASDAQ today is directly due to AAPL. Perhaps the drop in iAd sales rates or the drop in market share will dent expectations? Perhaps growth expectations from Europe will temper the excess? Or perhaps the 209 hedgies who rely on this stock for their year will play prisoner's dilemma (and free ride) one too many times and dismiss their recency bias to remember that the first one to migrate wins when prices go vertical.