Seria, a major 100-yen shop operator, plunged as much as 6.5% from the previous day to 4,180 yen at one point, sinking to its lowest level in about a month and a half, before closing down 200 yen at 4,270 yen. The sell-off was triggered by the company's preliminary September sales report released the previous day, which showed same-store sales rose 8.3% year on year, slowing from a 9.7% gain in August. Average spending per customer rose 2.2%, outpacing August's 1.7% increase, but customer traffic grew just 6.0%, below August's 7.9% gain. Total sales across all stores, including the contribution from new openings, rose 11.8%, continuing double-digit revenue growth. According to some analysts, sticker sales were roughly flat year on year, while daily necessities such as garbage bags and handicraft supplies remained strong. The stock had risen more than 40% year to date to a high of 4,905 yen set on September 15, and its decline from that peak has widened to about 15%.