Prices at Seoul's most expensive large apartment complexes fell for the first time in four months after the government announced a tax overhaul plan early last month, signaling a sharper split between the high-end Gangnam market and cheaper outer districts. Seoul apartment sale prices rose 1.13% in September from August, although the monthly pace slowed by 0.01 percentage point, according to KB Real Estate's nationwide housing price survey released on the 28th. The KB Leading Apartment 50 Index, which tracks the combined market value of the 50 most valuable apartment complexes, including Raemian One Bailey in Banpo-dong, Seocho-gu, fell 0.22% to 99.2. Gyeonggi Province accelerated, with prices rising 1.06%, while southern areas linked to the semiconductor industry posted the strongest gains. Seoul jeonse (Korean lease paid through a large deposit) prices rose 1.00%, but Gangnam-gu declined 0.19%; Gyeonggi jeonse prices increased 0.80%.