You can't compare a market weighted index price to unweighted aggregate earnings and get a meaningful result.
http://online.wsj.com/article/SB123552586347065675.html
http://online.wsj.com/article/SB123552586347065675.html
Quote from sub0:
"...the trailing P/E on âreportedâ earnings just widened to its highest levels in recorded history of nearly 140x (see chart below), which is three times the levels prevailing during the height of the tech bubble."