The headline number promoted during every drawing cycle does not represent money sitting idle in a vault. The Multi-State Lottery Association (MUSL) derives its headline jackpot by projecting a 30-installment annuity funded by current ticket sales and invested in fixed-income securities.
When a player chooses the annuity, the lottery buys an investment portfolio of U.S. government Treasury zero-coupon bonds. The advertised jackpot represents the total pretax sum of an initial payment followed by 29 annual disbursements that increase by 5% every year to adjust for expected inflation.
When interest rates sit near modern historic averages, the bond portfolio can generate substantial compounding over three decades. Consequently, when bond yields rise, the cash value required to fund the annuity falls; conversely, lower interest rates require lotteries to assemble a much larger immediate cash pool to promise the same annuity figure. For players seeking upfront cash, that projected 30-year accumulation vanishes immediately.