Return adjusted prices when true; raw prices when false. Defaults to false. Adjusted prices restate history onto today's per-share scale (the forward-adjustment convention): OHLC are multiplied by the cumulative factor of every stock split, cash dividend (including specials), and the price effect of spinoffs and distributions with an ex-date after the row's date. Volume is adjusted only for share-count-changing splits and rounded to whole shares. Not provided: valuation of spun-off entities and reconstructed total-return series.