Quantitative Research

JPX Margin Trading Weekly (Aug 28th): Kioxia, Seikoh Giken, Mitsubishi UFJ Financial, Advantest

28 Aug 2026 By Ke Yan, CFA
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Abstract: We analyzed JPX margin trading positions as of Aug 28th, covering stocks with market cap of at least USD 100m. The aggregated net margin trading position stood at USD 29,092m, up 3.2% from USD 28,184m the prior week, outpacing the TOPIX 500 index gain of 2.0%. Net long positions increased for 825 stocks while 1,167 stocks saw net short increases. The largest net long position was held by Kioxia (285A JP) at USD 4,990m, followed by SoftBank (9984 JP) at USD 1,050m and Mitsubishi UFJ Financial (8306 JP) at USD 739m. The biggest weekly net increase was Kioxia (Δ +USD 1,008m), followed by Seikoh Giken (6834 JP) (Δ +USD 144m) and Advantest (6857 JP) (Δ +USD 68m). On the other side, Mitsubishi UFJ Financial saw the largest net weekly decrease (Δ -USD 110m), followed by Sumitomo Mitsui Financial (8316 JP) (Δ -USD 54m) and Nintendo (7974 JP) (Δ -USD 47m).

Mitsubishi UFJ Financial (8306 JP) Advantest (6857 JP) Sumitomo Mitsui Financial (8316 JP) Seikoh Giken (6834 JP) Create Restaurants (3387 JP) Kioxia (285A JP)

Highlighted Stocks

Mitsubishi UFJ Financial, Advantest, Sumitomo Mitsui Financial, Seikoh Giken, Create Restaurants, Kioxia

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