Portfolio Factors — price-based factor decomposition of a book (clean_prices.db). HOW TO CALL: GET /api/portfolio-fac

Portfolio Factors — price-based factor decomposition of a book (clean_prices.db). HOW TO CALL: GET /api/portfolio-factors?holdings=xyz:NVDA:1000,BTC:500 PARAMETERS: holdings — TICKER:weight pairs, HL-format tickers (required) lookback — estimation window in days, 60–250 (default 120) RESPONSE: notional-weighted momentum, trend, book beta to S&P 500 and BTC. PRICING: $0.05 per call.