Index history for one fund as [{t, v}] points, always including the fund's first (inception) point and its latest point — the whole history is evenly downsampled to fit, never a tail slice, so points[0].v matches get_fund's inception_index_price_usd — unless inception_at is set and pre_inception_points > 0: those leading points are the basket's pro-forma value before listing, and the inception point is the first one at/after inception_at (AIB funds: nominally-hourly writes, actual spacing varies; MA-RIPPLE: daily value of $100 at inception; FTA-CRYPTOS: 30-day daily closes, only on days every constituent has a venue price). FTA-STOCKS and EVENT-CARD have no history series — use get_fund for their current numbers. An empty series carries a note saying why. Read-only, no auth.