# Non-CLS EM FX Settlement: Herstatt Risk & Nostro Drag

> Quantify bilateral Herstatt settlement risk across $2.2T+ of daily non-CLS emerging-market FX turnover, Nostro pre-funding carry drag, and BIS PvP netting.

Canonical: https://fxmacrowire.com/wire/non-cls-em-fx-herstatt-settlement-prefunding-drag
Last updated: 2026-11-14T19:37:58.710Z

**Publication:** FXMacro Wire
**Category:** Em Carry Terms of Trade Shocks
**Published:** 2026-11-13T09:50:25.915Z
**Author:** Henrik Lindqvist, CFA (CFA, MSc in International Monetary Economics (LSE))
**Reviewer:** Not recorded

## Answer-first summary

Only 18 currencies globally settle inside CLS Bank’s Payment-versus-Payment (PvP) network—leaving over $2.2 trillion per day of emerging-market deliverable spot and FX swaps exposed to time-zone Herstatt principal risk and costly Nostro pre-funding drag.

## Key takeaways

- Only 18 currencies settle inside CLS Bank PvP (including MXN, ZAR, SGD, HKD, ILS, KRW, HUF), leaving ~$2.2T+/day of non-CLS EM FX (PLN, CZK, TRY, THB) exposed to 8-14 hours of 100% principal Herstatt risk.
- Paradoxically, cash-settled offshore NDFs (INR, BRL, TWD, CLP) carry zero principal Herstatt risk because only net P&L settles in USD, predominantly via LCH ForexClear.
- Because sub-custodians prohibit daylight overdrafts in non-CLS currencies, 1.5 days of idle T-1 Nostro pre-funding on monthly rolls costs -28 bps/yr in PLN and -222 bps/yr in 45%-rate TRY.
- Rolling 3M-6M tenors with the same counterparty over CLSNet (120+ currencies automated bilateral payment netting) eliminates ~85% of gross non-CLS principal wires and rescues >180 bps/yr in high-yielders.

## Related financial entities

- **BIS $9.6 Trillion Global OTC Foreign Exchange Turnover Benchmark** (BIS-FX-SWAPS-96T) — product: BIS $9.6 Trillion Global OTC Foreign Exchange Turnover Benchmark (BIS-FX-SWAPS-96T) refers to an institutional financial benchmark and regulatory standard monitored by BIS Triennial Survey (INTL), currently calibrated at $9.6T (Daily OTC Volume) as of October 2026.
- **BIS $9.6 Trillion Global OTC Foreign Exchange Turnover Benchmark — 2026 Standard** (BIS-FX-SWAPS-96T-STD) — product: BIS-FX-SWAPS-96T 2026 Institutional Benchmark Framework is defined as the standardized quantitative and compliance methodology published by BIS Triennial Survey governing BIS $9.6 Trillion Global OTC Foreign Exchange Turnover Benchmark across INTL capital markets ($9.6T Daily OTC Volume, October 2026).
- **EUR/USD Cross-Currency Basis & ECB-Fed Rate Differential** (EURUSD-ESTR-SOFR) — product: EUR/USD Cross-Currency Basis & ECB-Fed Rate Differential (EURUSD-ESTR-SOFR) refers to an institutional financial benchmark and regulatory standard monitored by ECB / Federal Reserve (EU), currently calibrated at -187.5 bps (Policy Rate Spread) as of October 2026.

## Analysis

Inside FinDB's [$9.60T Daily Global OTC FX Turnover](/index/bis-fx-swaps-96t-bis-9-6-trillion-global-otc-foreign-exchange-turnover-benchmark) ([BIS-FX-SWAPS-96T 2026 Standard](/index/bis-fx-swaps-96t-2026-benchmark-standard)), **CLS Bank International** protects G10 currencies plus a handful of early-adopter emerging currencies (MXN, ZAR, SGD, HKD, ILS, KRW, HUF). **Every other deliverable currency on Earth—including Polish zloty (PLN), Czech koruna (CZK), Turkish lira (TRY), Thai baht (THB), Chinese offshore renminbi (CNH outside HK CHATS PvP), Romanian leu (RON), and frontier African/LatAm FX—settles OUTSIDE CLS Bank!**

As the **Bank for International Settlements (BIS) Committee on Payments and Market Infrastructures (CPMI)** repeatedly warns banking supervisors ([BCBS](/regulators/bcbs-bis), [ECB](/regulators/european-central-bank-160), [KNF Poland](/regulators/knf), [CNB Czechia](/regulators/cnb), and [BaFin](/regulators/bafin)), **over $2.2 trillion per day of FX turnover settles without Payment-versus-Payment (PvP) protection**—exposing trading desks not to 2% mark-to-market risk, **but to 100% GROSS PRINCIPAL LOSS ("Herstatt Risk")** alongside **35 to 95 bps of hidden Nostro pre-funding carry drag**!

## Time-Zone Anatomy of a Non-CLS EM FX Settlement Window!

Walk through an actual **$50,000,000 Spot USD/PLN or USD/THB trade** executed by a European institution via [Alior Trader](/brokers/alior-trader), [BGK](/brokers/bgk), or [Blocksize Capital](/brokers/blocksize-capital) where the fund **sells PLN (or THB) and buys USD for T+2 value**:
1. **09:00 Bangkok / 11:30 Warsaw Local RTGS Cutoff**: The fund instructs its local custodian (Nostro bank in Bangkok BAHTNET or Warsaw SORBNET2) to wire the **irrevocable THB 1.70 billion (or PLN 200 million) leg** to the counterparty!
2. **8 to 14 Hours of Unsecured Principal Exposure!**: Fedwire / CHIPS in New York has **not even opened yet** (or won't settle final USD receipts until 16:00–17:00 ET)! If the counterparty defaults at 13:00 CET (just as Bankhaus Herstatt failed at 15:30 CET on June 26, 1974!), **your $50,000,000 local leg is gone irrevocably while zero US dollars arrive in New York**!

![Timeline of a $50M non-CLS Asian/CEE FX trade showing local RTGS irrevocable payment, 12-hour Herstatt risk window, and T-1 Nostro pre-funding trap](/api/figure?type=flow&title=Non-CLS%20EM%20FX%20Settlement%3A%20T-1%20Pre-Funding%20%26%20Herstatt%20Window&subtitle=Why%20Asian%20%26%20CEE%20RTGS%20cutoffs%20create%208-to-14-hour%20100%25%20principal%20exposure%20before%20NY%20CHIPS%2FFedwire%20settles%20USD&steps=T%2B1%20Nostro%20Pre-Fund%3A%3ACustodian%20demands%20idle%20THB%2FTRY%2FPLN%20cash%20parked%2018-24h%20early!%7C09%2000%20Asia%20%2F%2011%2030%20CEE%3A%3ALocal%20RTGS%20wires%20100%25%20of%20EM%20currency%20leg%20irrevocably%7C12-Hour%20Risk%20Gap!%3A%3AUncollateralized%20100%25%20gross%20notional%20credit%20exposure%20until%20NY%20afternoon!%7C16%2030%20NY%20CHIPS%20USD%3A%3ACounterparty%20wires%20%2450M%20USD%20leg%20-%3E%20settlement%20exposure%20closes&metrics=NON-PVP%20FX%20GLOBAL%3A%3A~%242.2T%2B%20%2F%20Day%3A%3ABIS%20CPMI%20Unprotected%20Share!%7CCLS%20CURRENCIES%3A%3A18%20Eligible%3A%3APLN%2C%20CZK%2C%20TRY%2C%20THB%20Excluded!%7CPRE-FUNDING%20DRAG%3A%3A35%20-%2095%20bps%2Fyr%3A%3AZero-Interest%20Nostro%20Idle%20Cash%7CBCBS%20SUPERVISORY%3A%3ABasel%20Pillar%202%3A%3ASettlement%20Credit%20Line%20Caps!)

## CLS-Eligible vs Non-CLS Deliverable vs Offshore NDF Microstructure Matrix

Notice why **offshore NDFs** ([INR/KRW/BRL NDF mechanics](/wire/onshore-forward-versus-offshore-ndf-basis-inr-krw-brl)) paradoxically carry **FAR LESS settlement risk** than deliverable non-CLS spot currencies like **PLN**, **THB**, or **TRY**! Because an NDF never exchanges $50,000,000 of gross principal—only wiring the **net USD P&L difference (e.g., $420,000)** through LCH ForexClear!

| EM FX Settlement Category | Currencies Covered | Principal Herstatt Exposure | Hidden Nostro & Credit Line Drag |
| :--- | :--- | :--- | :--- |
| **CLS Bank PvP Members** | **MXN, ZAR, SGD, HKD, ILS, KRW (onshore), HUF** | **$0.00 (Zero!)** — Simultaneous atomic PvP | 96% multilateral funding compression; lowest operational cost |
| **Regional Local PvP Bridges** | **CNH / USD & EUR** via **HKMA CHATS**; MYR RENTAS link | Near-zero *only if* both banks join HK CHATS! | Many European/US buy-side custodians still settle CNH bilaterally! |
| **Deliverable Non-CLS EM** | **PLN, CZK, RON, TRY, THB, PHP (onshore), AED, SAR** | **100% of Gross Notional** for 6–14 hours! | Custodians require **T+1 Nostro pre-funding** paying 0% interest! |
| **Offshore Cleared NDFs** | **INR, BRL, TWD, CLP, COP, IDR, KRW (NDF)** | **$0.00 Principal Risk!** (Net USD P&L only) | Subject to UMR/LCH initial margin (~2%–4%), zero local Nostro drag |

## Quantitative Nostro Pre-Funding & Daylight Overdraft Drag Formula!

Here is the "invisible performance leak" that shocks quantitative FX researchers when transitioning a live strategy from paper backtests into real deliverable execution in **TRY** ([Turkish lira 45% carry](/wire/usdtry-cbrt-swap-unwind-orthodox-carry-reer-math)), **PLN** ([CEE-3 EUR/PLN carry](/wire/eurpln-eurczk-eurhuf-cee3-real-carry-eu-fund-inflows)), or **NGN/EGP/KES**:
- Global sub-custodian banks strictly **prohibit daylight overdrafts** in non-CLS emerging currencies (strict domestic central bank short-selling bans fine overdrafts heavily!).
- Therefore, whenever you roll a 1-month deliverable FX forward or settle a spot sale, your custodian requires **100% of the local currency cash to sit uninvested (0% interest!) in your local Nostro account for 1 to 2 days around every roll**!

```formula
Annual_Roll_Drag_bps = Rolls_Per_Year * ( Idle_Nostro_Days / 365 ) * y_Local_Overnight_Rate * 10,000
Net_Realized_Carry = Gross_Forward_Carry - Annual_Roll_Drag - Bilateral_Settlement_Line_Charge

Worked Nostro Pre-Funding Drag Audit on Monthly Deliverable Rolls (12 Rolls/Year, 1.5 Days Idle Nostro per Roll = 18 Days/Yr!):
 1. Low-Rate CZK (y_Local = 3.75%): 12 * (1.5 / 365) * 3.75% = -18.5 bps/yr hidden operational drag
 2. Moderate PLN (y_Local = 5.65%): 12 * (1.5 / 365) * 5.65% = -27.9 bps/yr hidden operational drag
 3. High-Yield TRY (y_Local = 45.0%): 12 * (1.5 / 365) * 45.0% = -221.9 bps/yr (-2.22%!) wiped out if rolled monthly with idle cash!!
```

![Annualized basis-point return drag from Nostro pre-funding across monthly vs quarterly rolls and CLS Netting / Tom-Next Netting solutions](/api/figure?type=bars&title=Hidden%20Non-CLS%20Nostro%20Pre-Funding%20Carry%20Drag%20%28bps%20%2F%20Year%29&subtitle=Using%20CLSNet%20bilateral%20netting%20%2B%203M%2F6M%20rolls%20rescues%20%3E180%20bps%2Fyr%20on%20high-yield%20non-CLS%20EM%20FX!&steps=TRY%201M%20Un-Netted%20%28-222bp%29%3A%3A18%20idle%20Nostro%20days%2Fyr%20%40%2045%25%20TLREF%20bleeds%20-2.22%25%20of%20return!%7CTRY%203M%20Quarterly%20%28-74bp%29%3A%3ACutting%20roll%20frequency%20from%2012x%20to%204x%20saves%20%2B148%20bps%20instantly!%7CPLN%201M%20Un-Netted%20%28-28bp%29%3A%3ASORBNET2%20T-1%20funding%20cutoff%20costs%20~28%20bps%20on%20monthly%20rolls%7CCLSNet%20Netted%20Roll%20%28-4bp!%29%3A%3AAutomated%20bilateral%20payment%20netting%20slashes%20gross%20wire%20by%20~85%25!&metrics=CLSNET%20COVERAGE%3A%3A120%2B%20Currencies%3A%3AStandardized%20Payment%20Netting%7CNETTING%20SAVINGS%3A%3A75%25%20-%2088%25%20Cut%3A%3AOnly%20Net%20Roll%20Difference%20Wires!%7CT%2B1%20US%20EQUITY%20HIT%3A%3ATighter%20Cutoffs%3A%3ACompressed%20Non-CLS%20FX%20Windows%7CBCBS%20GUIDELINE%3A%3A7%20PvP%20Principles%3A%3ASupervisory%20Capital%20Scrutiny)

## How Institutional FX Desks Eliminate Non-CLS Drag: CLSNet & Same-Counterparty Roll Netting!

Since North American securities moved to **T+1 settlement** (compressing afternoon FX affirmation windows globally), institutional FX operations teams execute **three best practices** on non-CLS currencies:
1. **Roll Forwards With the EXACT Same Counterparty via CLSNet Automated Bilateral Netting**: When extending a $50M **USD/PLN** or **USD/TRY** short forward at maturity with the same prime bank on **CLSNet** (which covers **120+ currencies** even outside core PvP!), the two offsetting $50M local legs **net down to zero**, wiring only the tiny mark-to-market roll difference!
2. **Extend Tenor From 1-Month to 3-Month or 6-Month IMM Dates**: Cuts operational settlement events by 67%–83%!
3. **Route Offshore CNH Explicitly Through Hong Kong HKMA USD CHATS PvP**: Eliminates Asian-to-New-York 12-hour Herstatt risk completely!

## Completing Your Institutional Silo 4 Mastery

From ex-ante real Carry-to-Volatility ratios and BIS 64-economy Broad REER gaps down to physical Nostro settlement plumbing, integrate all twenty frameworks across our [EM FX carry & REER hub guide](/wire/em-fx-carry-commodity-terms-of-trade-reer-guide-2026) and [EM FX carry & terms-of-trade hub](/topics/em-carry-terms-of-trade-shocks)!

## Frequently asked questions

### Which emerging-market currencies ARE eligible for full CLS Bank Payment-versus-Payment (PvP) settlement?

Of CLS Bank’s 18 settlement currencies, 7 are non-G10/emerging-hub currencies: Singapore dollar (SGD), Hong Kong dollar (HKD), Korean won (KRW), South African rand (ZAR), Mexican peso (MXN), Israeli shekel (ILS), and Hungarian forint (HUF).

### Why aren’t Polish zloty (PLN), Turkish lira (TRY), or Thai baht (THB) settled in CLS Bank?

Full CLS settlement membership requires complex legislative finality amendments, overlapping central bank RTGS operating hours during the 07:00-12:00 CET CLS window, and strict liquidity-provider commitments.

### What is the difference between CLS Settlement (PvP) and CLSNet?

CLS Settlement provides atomic central bank account Payment-versus-Payment for 18 currencies; CLSNet is an automated bilateral payment-netting calculation service for 120+ non-CLS currencies and same-day trades that nets offsetting flows down to a single small wire.

### How did the US move to T+1 equity settlement increase non-CLS EM FX operational risk?

Foreign investors buying or selling US equities on T+1 must affirm and fund cross-currency FX legs before Asian and Central European sub-custodian cutoffs the very next morning, leaving near-zero window to repair failed trade instructions.


## Source URLs

- https://www.bis.org/cpmi/publ/d207.htm
- https://www.bis.org/statistics/rpfx22.htm
- https://www.ecb.europa.eu/paym/groups/pdf/fxcg/index.en.html

## Citation

- APA: Henrik Lindqvist, CFA. (2026). Non-CLS Emerging-Market FX Settlement: Herstatt Risk & Nostro Pre-Funding Drag. FXMacro Wire. https://fxmacrowire.com/wire/non-cls-em-fx-herstatt-settlement-prefunding-drag
- Canonical article: [Non-CLS Emerging-Market FX Settlement: Herstatt Risk & Nostro Pre-Funding Drag](https://fxmacrowire.com/wire/non-cls-em-fx-herstatt-settlement-prefunding-drag)
- Site research index: [FXMacro Wire](https://fxmacrowire.com/llms-full.txt)