Market capitalization of South Korea's 10 largest business groups has dipped significantly this year despite a rise in total value of the local market driven by small and mid-cap stocks, the main bourse operator said Monday.

As of Thursday, the combined value of listed firms affiliated with the country's top 10 business groups, including Samsung Group, came to about 653.83 trillion won ($552 billion), down 9.06 percent from the end of 2014, according to the Korea Exchange.

The value of 24 listed firms affiliated with the largest, Samsung Group, plunged 12.13 percent over the cited period while that of seven listed affiliates of steelmaker POSCO tumbled 29.05 percent.

Out of the 10 top business groups, six saw their market capitalization shrink while four advanced.

Despite a large drop in the market value of large-cap stocks, the total market capitalization of the main KOSPI market gained

2.94 percent over the cited period as the market caps of small and mid-cap stocks fared well, spiking 25.1 percent and 27.23 percent, respectively, according to the KRX.

The benchmark KOSPI index climbed 2.42 percent to 1,962.11 on Thursday from 1,915.59 at the end of last year. (Yonhap)