# Gaps — Currencies & FX regimes SEA

As of **2026-09-17**. Empty cells are intentional; never zero-fill.

## AREAER vintage

- Locked to **AREAER 2023** Table 4 (**de facto as of 30 April 2023**). A newer AREAER vintage was not freely extractable as a full Table 4 at pull time; if AREAER 2024/2025 Table 4 becomes available, re-lock regimes with a new badge — do not silently update numbers in published graphics.
- De jure arrangements may differ from de facto; this pack uses **de facto** only.

## BIS effective exchange rates (REER / NEER)

| Economy | Status |
|---------|--------|
| IDN, MYS, PHL, THA, SGP | Locked (broad basket, 2020=100, monthly through **2026-08**) |
| VNM, KHM, LAO, MMR, BRN, TLS | **GAP** — not in BIS broad EER 64-economy `REF_AREA` set (verified via WS_EER pull). Do not invent or borrow narrow-basket proxies. |

## Bilateral USD (BIS WS_XRU)

| Economy | Latest A observation | Notes |
|---------|----------------------|-------|
| IDN, MYS, PHL, THA, SGP, BRN | **2026-08** | Prefer these for scoreboard |
| KHM | **2026-07** | Badge month |
| LAO, VNM | **2026-06** | Badge month |
| MMR | **2024-03** only | Conflict / data-quality caveat; WDI annual stops at **2020**. Do not present as current. `usd_yoy_pct` **GAP**. |
| TLS | No BIS series | Locked **1.0** via USD legal tender + WDI; `usd_yoy_pct` **GAP** |

## Concept firewalls

- Do **not** fill Singapore with a policy interest rate (see `inflation_policy_rates`).
- Do **not** treat bilateral YoY as competitiveness (use REER for that).
- Do **not** claim REER index level implies undervaluation vs PPP.

## Optional metrics not shipped

- Daily transaction-band mid-points (SBV ±5% vs USD) — described in `fx_regime_detail` only.
- Black-market / parallel rates (esp. Myanmar, Laos) — out of scope without a verified primary series.
- IMF IFS ENDA via dataservices.imf.org — host unresolved from this environment; BIS XRU + WDI used instead.