A man walks in front of the electronic stock board of a securities firm in Tokyo, Japan, Tuesday, Sept. 20, 2011. Asian stocks headed lower in early trading Tuesday, held back by intensifying worries over Greece's ability to fend off a massive debt default and a credit downgrade slapped on Italy. The benchmark Nikkei 225 stock average lost 124.42 points, to end morning session at 8739.74.(AP Photo/Itsuo Inouye)