The stock market is positive, WTF?

I just read the other day that Aluminum giant, Alcoa, released disappointing earnings for the quarter. Aluminum is used in many things in business such as automobiles, soda, etc. Aluminum is a great way to gauge the growth or decline of world economies. In this case, any reasonable person would make, from the news, that there is no demand for aluminum. Hence, the drop in cost per lb. Furthermore, people realize we are still caught-up in a slowing economy; one that has been contracting for well over a year. There will be no GDP growth this year. How? Every S&P 500 company has laid-off a percentage of their workforce. Why then is the stock market up today? A good question I don't know the answer to; other than the fact that earnings season is under way. I won't hold my breath. I know this economy is headed for more bad news. We may no longer be in free-fall, but our parachute has many holes in it.