Lau chiao will remember about 10yrs ago, when oil price shoot up, ferry ticket price go up a lot - see chart.
Then oil price go down a lot but ferry ticket price never go back down, fat fat profit for ferry operators.
Now oil price go back up to about same level as last time, so ferry ticket should be same as last time as oil price up at same level, but no - ferry ticket price go up some more!!!
Ferry ticket price follow oil price up, but never follow oil price down!!!
