The 2008.PRES.OBAMA Intrade contract now trades at 51.6, whereas the 2008.PRES.McCAIN Intrade contract is currently trading at 47.9 (compared with 52.2 and 47respectively as reported on yesterday’s update).

The state-by-state contracts continue to imply that Mr. Obama currently holds a 273-227 “lead” over Mr. McCain (based upon my cutoff price point of 55 for allocating Electoral College votes). The “swing” states continue to include Nevada (5 Electoral College votes), Ohio (20 Electoral College votes), and Virginia (13 Electoral College votes).

FiveThirtyEight.com reports a marginal change from yesterday, now giving Mr. Obama a 309 to 229 advantage over Mr. McCain.

Addendum: September 23, 2008 Electoral College Vote allocation

Barack Obama (273): California (55), Colorado (9), Connecticut (7), Delaware (3), District of Columbia (3), Hawaii (4), Illinois (21), Iowa (7), Maine (4), Maryland (10), Massachusetts (12), Michigan (17), Minnesota (10), New Hampshire (4), New Jersey (15), New Mexico (5), New York (31), Oregon (7), Pennsylvania (21), Rhode Island (4), Vermont (3), Washington (11), and Wisconsin (10)

John McCain (227): Alabama (9), Alaska (3), Arizona (10), Arkansas (6), Florida (27), Georgia (15), Idaho (4), Indiana (11), Kansas (6), Kentucky (8), Louisiana (9), Mississippi (6), Missouri (11), Montana (3), Nebraska (5), North Carolina (15), North Dakota (3), Oklahoma (7), South Carolina (8), South Dakota (3), Tennessee (11), Texas (34), Utah (5), West Virginia (5), and Wyoming (3)