Bond Execution in Practice: Arb to Book-Building
The core of every DCM pitch is a single claim: "Using our house, issuing in this currency saves you Xbp versus direct USD issuance." This chapter unpacks exactly how that number is calculated — and what decisions unfold in the 4 hours of bookbuilding on deal day. We walk through the entire process using a Korea sovereign EUR issuance case study.
1. Why This Currency — The Full Arb Structure
Whether issuing in JPY or EUR, the issuer ultimately needs USD-equivalent funding. Converting every currency's all-in cost back to USD (SOFR basis) is the starting point of arb calculation.
No hedge needed, deepest USD liquidity
2-step swap: IRS + CCBS. Builds European investor base
Largest basis from BOJ ultra-low rate era. Japanese life insurers & pensions
USD-denominated, no FX swap. Arb from structural excess demand by Taiwan insurers
With BOJ near-zero rates, domestic bond yields at ~0%. Japanese life insurers and pensions rushed into USD assets for yield → structural surge in JPY→USD hedging demand → USD/JPY CCBS basis widens sharply. A structural imbalance locked in over years.
Formosa bonds are USD-denominated — no FX swap needed. The arb comes purely from structural excess demand: Taiwanese insurers sell large volumes of USD savings products and need USD assets. Spreads compress directly from demand, no swap math required.
What Bankers Check Every Morning
Bloomberg FXFA screen — live USD/JPY, EUR/USD, USD/TWD CCBS levels. "The Samurai window opened today" means this number widened from yesterday. The basis widens at year-end (bank regulatory capital period) and tightens in USD-strength phases. Syndicate desk morning calls begin with this update.
2. EUR Arb in 3 Steps — The Actual Swap Mechanics
How EUR MS+65bp issuance converts to SOFR+47bp equivalent — following the actual swap contract flow.
EUR coupon obligation: EUR MS + 65bp
Pay EUR fixed, receive EURIBOR. Cancels the EUR MS component.
Pay EURIBOR, receive USD SOFR. Apply −18bp basis.
USD Direct
SOFR + 80bp
→
EUR issuance
EUR → USD
SOFR + 47bp
→ 33bp Arb Saving
EUR 500mn deal = approx. EUR 1.65mn annual saving
3. Bloomberg Comps → IPT Construction
The core page of any pitchbook is the Bloomberg secondary comps table. These numbers are the evidence base for IPT. Which comps to include or exclude can shift IPT by 5–8bp — and the issuer's IR team is ready to challenge every choice.
| Issuer | Rating | Tenor | ASW Spread |
|---|---|---|---|
🇩🇪KfW | AAA | 5Y | ASW +10bp |
🇪🇺EIB | AAA | 5Y | ASW +12bp |
🇫🇷CADES | AA | 5Y | ASW +25bp |
🇰🇷KoreaFinanceIssuer | AA | 5Y | ASW +52bp |
🇰🇷KEXIM | AA− | 5Y | ASW +62bp |
🇰🇷KDB | AA− | 5Y | ASW +65bp |
IPT Construction Logic
💡 Practitioner's Note
Every bank pitching selects different comps. Bank A uses KEXIM secondary; Bank B benchmarks against CADES. The choice shifts fair value by 5–8bp and changes the IPT. The issuer's IR team will immediately challenge: "Why didn't you include this comp?" This is why banks present different IPT numbers for the same deal — not calculation errors, but deliberate comp selection differences.
4. Bookbuilding: 4 Hours of Real-Time Decisions
From IPT announcement to final pricing, the syndicate desk simultaneously evaluates book quantity and quality to decide whether — and by how much — to tighten. These 4 hours determine billions in issuer funding cost.
Syndicate desk contacts key accounts via Bloomberg message + phone simultaneously. "EUR 5yr, ASW+65bp area, min EUR 500mn"
Still cautious. Central banks and European insurers haven't entered yet. Hold.
Central banks EUR 400mn, insurers EUR 350mn entered. Real money dominated. Book quality solid. → First tightening decision
HF EUR 150mn entered but only 8% of book — healthy composition. Consider upsizing EUR 500mn → 600mn. Lock final.
−8bp tight vs. IPT. EUR 600mn confirmed. Settlement T+5. ISIN assigned. Allocation notifications sent.
Tightening Guidelines by Coverage
* Rule of thumb; actual judgment depends on book quality (real money share)
5. Order Book Anatomy — Real Money vs. Fast Money
3.6× coverage doesn't mean all orders are equal. EUR 400mn from central banks and EUR 400mn from hedge funds have entirely different implications. Allocation strategy reflects this quality difference.
Never sell. Less NIC sensitive. Top-priority allocation. Anchor of secondary stability.
Buy-and-hold. Duration matching. Prefer IG under Solvency II capital rules.
Index-inclusion sensitive. Mostly hold. Large orders but standard haircuts.
Fast money. May sell immediately in secondary. Major allocation haircut. But contributes to book coverage.
Geographic diversification. Strong hold-to-maturity tendency. Small but strengthens IR relationships.
4 Allocation Principles
Real money first
Central banks & insurers never sell → secondary stability → next deal trust
Geographic spread
Asia/Europe/Middle East mix → IR purpose + regional anchor building
Haircut fast money
Allocate ~30% of HF orders → minimize secondary selling pressure
Reward loyalty
Accounts that consistently ordered in past deals → strong allocation this time
6. Secondary Performance — Not the End, the Start of the Next Deal
How a bond trades in the secondary market after issuance directly affects the NIC, coverage, and investor participation of the next deal.
Success
Secondary ~ASW +55bp
+2bp vs. issue price → investor profit → stable next deal orders
Caution
Secondary ~ASW +58–60bp (flat)
Investor P&L near zero → potential NIC demand next time
Failure (Break)
Secondary ASW +63bp+ (below issue)
Investor loss → much higher NIC, lower coverage, banker reputation damage
Why Issue Even at Expensive Terms — IR Building
Korea's motivation to issue in Samurai or Formosa isn't purely about cheap funding. The fact that "the Taiwan central bank holds our bonds" is itself a strategic asset. Long absences from a market mean higher NIC on return. For sovereigns and agencies with annual issuance programs, diversifying the investor base is a strategic objective independent of cost efficiency. IR-motivated issuance is justified even with no arb window.
7. The Pitch Page — What You Actually Show the Issuer
All the complex calculations compress into one summary page shown to the issuer's treasury team. Below is the core structure of the pitch a 외평채 officer would receive.
Syndicate Desk Market Update
Korea MOEF EUR 5Y — Issuance Timing Analysis
Reference date: November 2023
Current Market Conditions
(2 weeks ago −12bp → window widened)
CADES recent deal 2.8× covered
2 weeks ago +65bp (tightening)
Expected Deal Terms
USD Direct
SOFR +75bp
→
EUR + USD swap
EUR → USD Equiv.
SOFR +47bp
28bp Arb
EUR 500mn deal → approx. EUR 1.4mn annual saving
→ EUR window currently open. Recommend issuance within 2 weeks.
Frequently Asked Questions
References
- [1]Bank for International Settlements. Cross-currency basis: Evidence from FX swaps and cross-currency basis swaps— BIS Working Papers No.769, 2019
- [2]
- [3]Federal Reserve Bank of New York. Covered Interest Parity Deviations: Macrofinancial Determinants— NY Fed Staff Reports, 2017
- [4]
- [5]
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