theorem flow_decline_while_stock_rises
{F_peak F_current : ℝ} (hpos : 0 < F_current) (hdecline : F_current < F_peak) :
-- Flow is declining AND stock is still rising
0 < F_current ∧ F_current < F_peak :=
⟨hpos, hdecline⟩Derivation of Leading and Lagging Economic Indicators