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This skill enables Claude to programmatically fetch and process Japanese Securities Dealers Association (JSDA) data to monitor the behavior of life and non-life insurance companies in the super-long JGB market (10+ years). It automates the extraction of net sale figures, identifies historical record-breaking selling patterns, calculates consecutive streaks, and provides statistical context through Z-scores. It is an essential tool for macro analysts and traders who need to verify market narratives regarding Japanese institutional selling pressure without manual spreadsheet manipulation.