Stock investment

Sources: Phase 2 で J-Quants / public exchange RSS / 公的市場 data source 追加予定 (ToS verify 必須).

No dedicated news source for this category in the current build. rei-aios.pages.dev/data/studystoa-feed/latest.json currently ships philosophy / thought / education / learning categories only — stock + fx sources are scheduled for a later Phase 2 of the data bridge.