# PPN (Equitum)

See how a principal protected note is built.

Explore how a zero-coupon bond and an option combine in a principal protected note. Change the participation rate and inspect how the modeled payoff changes at maturity.

- Author: Mohammed Husamuddin
- Case study: https://projects.ihusam.tech/projects/ppn
- Status: live
- Year: 2025
- Topics: Finance, Visualization, Derivatives, Structured Products
- Technology: Next.js, Financial Modeling, Interactive Charts, Derivatives Pricing
- Project URL: https://ppn.ihusam.tech/

## Structured Products, Unstructured Understanding

Principal Protected Notes are one of the most elegant instruments in finance: you get your money back no matter what, plus upside if the market cooperates. Sounds too good to be true?

It's not — but the devil is in the details. And most people can't see the details because the math is opaque. PPN makes it visual.

### Anatomy of a PPN
Your Investment ($1,000) → Zero-Coupon Bond, Call Option, Principal Protection, Market Upside

## Two Instruments, One Product

Every PPN is really two things glued together. A zero-coupon bond that grows to guarantee your principal at maturity. And a call option that captures market upside.

The split between them depends on interest rates, volatility, and time to maturity. Change any of these — and the entire payoff profile shifts.

### Zero-Coupon Bond
Purchased at a discount. Matures at face value. This component guarantees your initial investment is returned — regardless of what the market does.

### Call Option
The leftover capital buys market exposure. If the underlying asset rises, you participate in the upside — typically capped by a participation rate (e.g., 70% of S&P gains).

> The higher the interest rate environment, the cheaper the bond component — which means more capital available for the option. This is why PPNs are more attractive when rates are high.

## What You Can't See Will Cost You

PPNs sound great in a pitch deck. But embedded fees, issuer credit risk, and liquidity constraints can silently eat into your returns. Most investors never see these because they can't model the payoff themselves.

PPN changes that.

- Embedded Fees: The derivative overlay includes structuring costs that reduce your effective participation rate
- Issuer Risk: Your principal guarantee is only as good as the issuer's credit. If they default, so does your protection.
- Liquidity Lock: Exiting before maturity often means selling at a discount — or not being able to sell at all
- Participation Caps: You rarely get 100% of the upside. Understanding the effective rate is critical.

## Interactive, Not Static

Drag a slider. Watch the payoff curve reshape. Change the maturity, the participation rate, the protection level. See exactly how each parameter affects your potential returns.

This isn't a PDF. It's a thinking tool.

### Adjustable Parameters

- Maturity (1–10 years)
- Participation rate (50–100%)
- Protection level (80–100%)
- Underlying asset selection
- Interest rate environment

### Visual Outputs

- Payoff diagram across scenarios
- Component allocation breakdown
- Fee impact visualization
- Comparison vs direct investment