Stock price is a measure of projected future income stream, not the present or past income streams. When future income is expected to rise, the stock price will go up. When income is stagnant, the price will stay stagnant and most often comes down as investors sell to find value in other stocks. When a company is going bankrupt, the stock will be pennies.
Take note, it is not revenue but income. Ford's income for FY 16 was $4.6B compared to an income of $7.3B from FY 15. Revenue has been flat for the last 4 years. "Best selling brand" does not mean anything. You have to look at the financials of a company. Compare this to the stock of Facebook and you will see why FB has risen ninefold since 2013.
· 10 months ago