Most Expensive Stock in the US. by tom8425 Commentshttp%3A%2F%2Fmost-expensive.com%2Fstock-share-priceMost+Expensive+Stock+in+the+US2006-10-08+18%3A56%3A47tomhttp%3A%2F%2Fmost-expensive.net%2Fstock-share-price. Stock price is determined fundamentally with the law of supply and demand.