1. The Four Bond Types Explained

The bond market features four distinct instrument classes, each catering to different strategic capital allocation needs:

A. Plain Vanilla Bonds

The classic baseline fixed-income debt contract. You purchase the bond at exactly its face value (principal). Throughout the holding period, your corporate bank account receives regular daily coupon interest payments. Upon reaching the expiration date, 100% of your initial investment principal is automatically credited back to your liquid balance.

B. Zero Coupon Bonds

Zero coupon bonds do not pay ongoing daily interest. Instead, they are issued at a substantial discount relative to their redemption face value. For instance, purchasing a Zero Coupon bond with a €50,000,000 face value for an issue price of €42,000,000 yields no daily cash, but locks in a guaranteed €8,000,000 windfall capital gain upon maturity date.

C. Premium Bonds

Designed specifically for liquidity-hungry conglomerates, Premium bonds require an upfront purchase price higher than the face principal. In return, the issuer pays an aggressive, enhanced daily coupon yield. Over the course of the holding term, the heightened daily income far exceeds the premium paid, generating high ongoing cash turnover.

D. Discount Bonds

Discount bonds offer a balanced intermediate strategy between Plain Vanilla and Zero Coupon debt. You acquire the bond below its nominal face value while still receiving a modest daily coupon payment. Upon maturity, the full face value is refunded, combining ongoing daily liquidity with positive capital gains.

2. Bond Maturities & Investment Horizons

Every bond offered on the market is issued with a fixed maturity period (duration in days). The maturity determines both how long capital remains committed and the total return yield:

A. Yield Escalation (Term Structure of Interest)

To incentivize longer capital commitments, bond yields scale upward with maturity. While a 5-day bond offers 5.0% to 8.0% daily coupon interest, 60-day debt contracts offer up to 20.0% to 24.3% daily coupons. For Zero Coupon bonds, a 5-day contract yields a +25% payout premium at maturity, whereas a 60-day contract yields an astronomical +750% to +1,200% capital windfall on redemption.

B. Tranche Sizing: Standard vs. Megacap Institutional

Offerings are divided into two distinct subscription sizes:

• Standard Tranches (€10,000 Base Unit): Lower entry barrier, allowing corporate treasuries to test different asset allocations across various maturities without overcommitting liquidity.
• Institutional Megacap Tranches (€250,000 – €300,000 Base Unit): Designed for corporations with hundreds of millions in excess capital, offering higher absolute daily cash flows and superior cumulative coupon multipliers.

C. Capital Lockup & Maturity Redemption Lifecycle

Once purchased, bond principal remains committed in the contract until the expiration timestamp (expirationDate = purchaseDate + maturity days):

• No Early Premature Liquidation: Bonds cannot be prematurely cancelled; holding until the contractual maturity guarantees 100% of the principal redemption sum.
• Automated Maturity Payout: At 00:02 midnight on the expiration date, the backend engine automatically liquidates the bond, deposits 100% of the face principal back into your bank cash balance, and logs the redemption in your financial event log.

3. Secondary Market Pricing & Mark-to-Market Valuation

Every active bond in your portfolio is evaluated continuously using dynamic secondary market pricing curves:

• Market Repricing Engine: During the nightly bond engine run (crons/bonds.php), UserBondDAO::updateMarketPrices() re-evaluates the secondary market value of all active contracts based on their current coupon yield relative to benchmark interest rates and remaining time until maturity.
• Accrued Value Change: Your Bonds Portfolio displays the real-time mark-to-market performance of your holdings (Accrued Value Change %), showing whether secondary market conditions have appreciated your position above initial purchase cost.
• No Forced Early Liquidation: Bonds held to full maturity will always redeem at 100% of par principal, guaranteeing full capital return regardless of interim market fluctuations.

4. Daily Coupon Settlements & Tax Treatment

The execution lifecycle for bond holdings is fully automated:

• Daily Midnight Payout: At midnight turn processing, all active coupon interest is calculated and credited directly to your liquid bank balance and corporate turnover.
• Tax Treatment: Bond coupon earnings are logged under finances.bondInterests as financial income and reflected transparently on your corporate Profit Sheet.
• Automated Principal Redemption: When a bond reaches its expiration timestamp (expirationDate ≤ today), the cron engine automatically redeems the full principal sum into your liquid cash balance and safely purges the matured position.

5. Why Bonds Are Gated to Tier 4 Megacap (€1,000,000,000+)

Businessgame progression is intentionally designed to align financial mechanics with corporate scale:

• Early Stage Capital Demands: In Tiers 0 through 3 (Startup, Enterprise, Corporation, Multinational), player capital generates far higher ROI when invested directly into factories, raw material reserves, supply chain integration, and corporate headquarters staff.
• Treasury Satiation & Cash Drag: Upon crossing €1 Billion in net assets (Megacap), corporations often generate tens of millions in surplus daily cash flow that outpaces physical factory construction. At this scale, the Bonds Investment Desk prevents idle capital drag by locking in passive institutional yield.