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Level 4 · ◆◆ · ~11 min

Annuities & Perpetuities

Annuities & Perpetuities

"Level and growing cash-flow streams show up everywhere — mortgages, bonds, stocks, pensions. Three shortcut formulas save you from discounting them one flow at a time."

perpetuitygrowing perpetuity (Gordon)annuity & the annuity factormatching the shortcut to the stream
🚀 You're jumping ahead. This builds on The Time Value of Money — but play it now and you'll still earn full XP. If it feels steep, those make a gentler on-ramp.

A short lesson, then a quiz. ❤️×3 — a wrong answer costs a heart; finish with at least one left and the level is yours. Lose all three and you'll have to try again. Replay any time — XP and cleared levels are never lost.