FinanceAI boom fuels activity on alternatives to Tokyo Stock ExchangeJapan's Financial Services Agency has encouraged the growth of proprietary trading systems to ease the concentration of trading at the Tokyo Stock Exchange. (Photo by Yuji Murakami)TAKAHISA TAMURA, YUKI NAKAMURA and RYUTA MINAMIHATAAugust 7, 2026 03:23 JSTTOKYO -- Japanese financial authorities will explore changing a rule that separates proprietary trading systems from full-fledged securities exchanges, Nikkei has learned, as the popularity of these alternative platforms grows.