THE Consumer Council has added supermarkets and the energy industry to its hit-list for research on whether monopolies fix prices too high and hold the quality of products and services down. The chairman of the Consumer Council, Professor Edward Chen Kwan-yiu, said the Government had granted the council $800,000 and it had established a Working Group on Competition Policy to identify unfair, discriminatory or anti-competition business and personal practices and effects on consumer interests. The council announced last month that it would look at telecommunications, broadcasting, banking and professional fees. But, yesterday, it added supermarkets and energy industry to the study. Professor Chen said it was ''obvious that two chains are taking up a big slice of the supermarket market. We are concerned whether this works to the benefit of the consumer or not''. Supermarket shoppers said competition would lower prices and increase the standard of service. Many customers at a Taikoo Shing outlet of one leading chain told the South China Morning Post they shopped at the larger chain stores because they were close to their homes and supplied all their needs in one visit. Many shoppers also thought prices compared well to markets, but would be more competitive without the monopoly. ''It seems Park'N Shop and Wellcome are a cartel; they can just fix prices as they please,'' said one shopper. Banking services were a priority for the council's research because complaints had risen for a second year in a row - this time by about 21 per cent since 1991. It was the fourth biggest category in terms of percentage increase, with complaints increasing from 117 in January to November 1991 to 141 in the same period last year. Professor Chen said the banks' fixed interest-rate agreement was a possible anti-competition measure, but the council also was concerned about the number of depositor charges. The Banking Commissioner, Mr David Carse, warned that any changes, particularly deregulation moves, should consider the broader picture. ''It would be a narrow point of view to only consider whether customers are hard done by. What is good for the banking stability of Hongkong is good for all consumers whether they are bank customers or not,'' he said. The secretary of the Hongkong Association of Banks, Mr Steve Troop, said the association's membership of 164 fully-licensed banks ensured the industry was competitive. He said dissatisfaction in Hongkong was linked more to customers not hearing about different fees charged by banks.