Vauban has been the heavily backed favourite in all-in Melbourne Cup markets with the boom International stayer shortening from $4.00 into $3.50 with betting sites this week prior to the barrier draw and final field after an eye catching gallop at Flemington on Tuesday where to the eye he looked ultra impressive.Following the release of the Melbourne Cup field punters have crunched the International stayers odds and he now sits clear cut at the top of markets and could start the shortest priced favourite in the Melbourne Cup in a long time with his current price being $3.10.