Lawmakers have accused the two leading supermarket chains of colluding on prices, after a study found that the cost of products went up and down at the same time at both ParknShop and Wellcome.
The Federation of Trade Unions study found that the price of two of the eight products it monitored rose and fell at both supermarkets together and stayed at the same level for at least 14 days.
While one legal expert said the fact the prices were the same was not enough to prove collusion, a lawmaker said the study showed the urgency of passing the long-awaited competition bill.
'The [competition] law will offer a legal framework for investigation of price collusion,' labour sector legislator Pan Pey-chyou said yesterday. 'The court will make a fair judgment.'
The study monitored eight products - including toilet paper, rice, Coca-Cola, canned food and seasoning - from February to last month across five districts: Wong Tai Sin, Tsuen Wan, Sham Shui Po, Sai Wan and Ap Lei Chau.
It found the prices of seven items remained the same at both two supermarkets on at least five days of the 16-day sampling period.