How do principal protected notes (PPNs) achieve capital preservation while offering equity upside?

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AcadiFi · Accepted Answer

A principal protected note combines a zero-coupon bond with an equity option. Consider Meridian Bank issuing a 5-year PPN at $1,000 par. With market rates at 4.5%, the bank buys a zero-coupon bond for roughly $800 that grows to $1,000 at maturity — this guarantees the principal. The remaining $200 minus fees (say $30) leaves $170 to purchase a 5-year at-the-money call option on the S&P 500. If the index rises 40%, the option pays off and the investor receives $1,000 principal plus the option payoff; if the index falls, the investor still gets $1,000 back. Hidden costs include: (1) opportunity cost of forgone coupons from a plain bond, (2) participation rate below 100% (often 70-85%), (3) credit risk of the issuer — the 'guarantee' is only as strong as Meridian Bank itself, as Lehman PPN holders learned in 2008, (4) caps on upside, and (5) illiquidity since secondary markets are thin. The issuer earns a spread between the theoretical option cost and the embedded option value, which is the structured product profit margin.

How do principal protected notes (PPNs) achieve capital preservation while offering equity upside?

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