By Wally Pyrah HAPPY Valley in Hong Kong hosts another nine-race programme today, jam-packed with highly competitive handicaps and featuring the £200,000 Graham Handicap (2.45pm) over the extended mile. The unseasonably rainy weather has continued to be an important factor in determining winners over the past month, with Sha Tin last Sunday continuing the trend of favouring gallopers who race up with the early pace. The majority of winners on the 11-race card all bounced out near the front from the start, with only Zac Purton bucking the trend aboard Aestheticism, when coming from the back to …