Building a Profit Prediction Model for Options Trading Using Newspaper Articles and Online Message Board Posts. - Koshi Yamazaki; Ren Hosokawa; Kentaro Ueda; Kota Kotegawa; Hirohiko Suwa; Kota Tsubouchi; Eiichi Umehara; Yuki Ogawa; Hiromitsu Hattori (IEEE Access, 2026)