hong kong stocks opened slightly higher tuesday morning following four days of losses with attention on the united states as lawmakers debate a bill to lift the countrys debt ceiling the hang seng index edged up 012 percent or 2308 points to 1857419 the shanghai composite index lost 021 percent or 678 points to 321467 while the shenzhen composite index on chinas second exchange dropped 021 percent or 428 points to 199787