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Debt SecuritiesFunction 3⏱ 10 min read

2.3 Corporate Bonds

Corporate debt issues range from highly secure equipment obligations to speculative junk debentures and hybrid convertible bonds with equity participation upside.

Key FINRA Exam Takeaways

  • Secured corporate debt: Mortgage bonds (real property), Collateral trust bonds (securities), Equipment trust certificates (rolling stock/airplanes).
  • Unsecured debt: Debentures (backed only by full faith and credit) and Subordinated debentures.
  • Convertible bonds: Conversion Ratio = Par ($1,000) ÷ Conversion Price.
  • Parity calculations: Parity of Stock = Market Price of Bond ÷ Conversion Ratio; Parity of Bond = Market Price of Stock × Conversion Ratio.
  • Trust Indenture Act of 1939 requires corporate debt issues >$50M to have an independent trustee protecting bondholders.

Secured vs. Unsecured Corporate Debt

Equipment Trust Certificates (ETCs) are secured by physical machinery, airplanes, or locomotives, holding high investment-grade ratings. Debentures rely solely on the issuer's general creditworthiness.

Convertible Bonds and Parity Calculations

Conversion Ratio = $1,000 Par ÷ Conversion Price. If Conversion Price is $25, the bond converts into 40 shares ($1,000 / $25). Parity Stock Price = Bond Price ÷ 40. If the bond trades at $1,200, parity stock price is $30.

Convertible Bond Parity Calculation

An investor owns an XYZ Corp 5% convertible bond trading at 108 ($1,080). The conversion price is $20. What is the parity price of the underlying common stock?

  1. Step 1: Calculate Conversion Ratio = $1,000 Par ÷ $20 Conversion Price = 50 shares.
  2. Step 2: Calculate Parity of Stock = Current Market Price of Bond ($1,080) ÷ 50 shares.
  3. Step 3: $1,080 ÷ 50 = $21.60.
Result: Parity price of the common stock is $21.60.
Interactive Knowledge Checkpoint • Section 2.3

An investor owns an ABC Corp convertible debenture with a conversion price of $40. The common stock of ABC is currently trading at $45 per share. What is the parity price of the bond?