---
canonical: true
last_updated: 2026-08-12
session_id: 2026-08-12-block-027-partial
prior_session: 2026-08-10-block-027-open-resume
current_block: 027
current_block_slug: fx-carry-trades
block_status: ◐ partial
phase: 1
pre_block_probes_fired: 4
pre_block_probes_clean: 4
substrate_status: locked
targets_pending:
  - target_3_carry_unwind_asymmetry
  - target_4_pm_implications
anki_queue:
  card_count: 0
  cards: []
pre_reads:
  - source: menkhoff_sarno_schmeling_schrimpf_2012
    title: "Carry trades and global FX volatility"
    type: academic
    time_min: 25
    status: teach-delivered-2026-08-11
    teach_artifact: blocks/_pre-read-teaches/027-fx-carry-trades-pre-read-teach-2026-08-11.md
  - source: bis_bulletin_90
    title: "The market turbulence and carry trade unwind of August 2024"
    type: institutional
    time_min: 10
    status: teach-delivered-2026-08-11
    teach_artifact: blocks/_pre-read-teaches/027-fx-carry-trades-pre-read-teach-2026-08-11.md
  - source: bis_bulletin_124
    title: "Monetary policy transmission to exchange rates: the role of currency carry trades"
    type: institutional
    time_min: 10
    status: teach-delivered-2026-08-11
    teach_artifact: blocks/_pre-read-teaches/027-fx-carry-trades-pre-read-teach-2026-08-11.md
pre_read_substitution_note: "Pre-emptive teach-first (per macro-mentor teach-pre-reads.md). User opted to have substrate taught by mentor instead of reading. Verification gate at next open: 'did you do the read OR get the teach?'."
anki_cards_pushed:
  - date: 2026-08-11
    count: 15
    deck: "Macro Study::Phase 1 — Components::FX"
    first_note_id: 1786448537065
    last_note_id: 1786448537420
  - date: 2026-08-12
    count: 2
    deck: "Macro Study::Phase 1 — Components::FX"
    note_ids: [1786534453742, 1786534817367]
    tag: user-flagged
carry_forwards:
  - carry_trade_direction_locked_borrow_low_invest_high
  - carry_interface_trade_rate_differential_vol_regime
  - three_layer_alignment_diagnostic_vol_rate_positioning
  - carry_unwind_positioning_vs_funding_aug_2024_vs_2008_2020
  - trade_construction_go_against_crowded_carry
  - basis_is_separate_diagnostic_not_carry_pnl_line
  - funding_currency_selection_rate_persistence_own_vol_risk_off_correlation
  - carry_to_risk_four_cell_matrix_take_fade_wait_hold
  - vol_drag_conditional_asymmetry_path_dependency_forced_selling
  - breakeven_vol_regime_forward_looking_kill_threshold
  - implied_vs_historical_vol_spread_regime_shift_signal
patterns_to_load:
  - pattern_11_mechanism_cold_recall
  - pattern_18_mechanism_not_calculation_probes
  - pattern_25_compact_output_discipline
---

# Session 43 — Block 027 partial close (2026-08-12)

**Status:** Block 027 partial. Targets 1-2 closed Working+. Targets 3-4 pending.

## What we did

**Pre-block probes (4):** Vol drag mechanism, funding-currency selection (Probe 2 with JPY-as-safe-haven tangent), unwind asymmetry (Probe 3 — teach on positioning vs funding finite/infinite forced-seller distinction), PM trade + time-horizon for each unwind type. 4/4 Working+.

**Target 1 — Carry trade construction (closed Working+):**
- Direction locked (borrow low-yield, invest high-yield).
- Funding-currency selection = rate persistence + own-vol + correlation with risk-off. Sovereign risk is cross-check, not primary.
- JPY case: structural safe-haven AND carry-funding currency = correlated failure mode at the wrong time. User caught this in Probe 3 framing question — both channels compound in Aug 2024.
- Carry-to-risk four-cell matrix locked as user-flagged Anki card (1786534817367).

**Target 2 — Volatility drag (closed Working+):**
- Mechanism: conditional asymmetry + path dependency + forced-selling channel (trader-side in positioning, bank-side in funding).
- Path dependency explained via three examples: same total loss different timing; compounded vs simple drag; Aug 2024 forced-selling compounding.
- Breakeven vol regime = forward-looking kill threshold. Above breakeven, trade is vol bet not carry trade.
- Implied vs historical vol spread = regime shift signal.

## Carry-forwards to Targets 3-4

Substrate for Target 3 already loaded via Probe 3 teach:
- Positioning unwinds self-stabilize (finite forced sellers, days).
- Funding unwinds require Fed action (infinite constraint on bank balance sheet, weeks-months).
- PM trade: fade the crowded carry (positioning, short horizon, tight stop, smaller size) vs fade the basis (funding, longer horizon, wide stop, larger size because Fed action is structural backstop).
- Cross-currency basis as discriminator: stable = positioning unwind, blow-out = funding unwind.

## State for next session

- **Block 027 partial.** Targets 1-2 closed. Targets 3-4 pending.
- **Anki cards pushed (Session 43):** 2 user-flagged cards (fade the basis construction + carry-to-risk four-cell matrix).
- **Total Anki cards pushed Block 027:** 17 (15 from teach + 2 user-flagged today).
- **Pre-read for Block 028:** TBD at next session open when Targets 3-4 close. Candidates named in block carry-forward.
- **Resume file:** this document.
- **Canonical pointer:** this file replaces `_meta/current-block.md` + `pre-reads.md` per Session 41 triage.

## Directive for next session open

1. Verify pre-block probes already fired 4/4 Working+ in Session 43 — do NOT re-probe. Walk Targets 3-4 in order.
2. Target 3: positioning-vs-funding unwind asymmetry is partially loaded via Probe 3 teach; target main material = the time-to-resolution read + cross-currency basis as discriminator.
3. Target 4: PM implications — funding-currency selection rules, position sizing under carry-to-risk, interaction with cross-currency basis (Block 023) and CB reaction functions (Block 024). Probe new substrate, not pre-read vocabulary.
4. Pattern #11 + Pattern #18 active. Mechanism probes only.
5. Compact output, no streaming deliberation (Pattern #25 + user preference 2026-08-10).
6. Frame each probe without pre-loading the answer (Pattern #23).
7. At Block 027 close: assign Block 028 pre-read with full chapter/section specificity (per 2026-07-03 protocol).

## User feedback applicable next session

- **Compact output, no streaming deliberation** (Pattern #25 + user preference, codified Session 42).
- **Probe without pre-loading the answer** (Pattern #23, codified Session 42).
- **Mechanism not calculation** (Pattern #18, codified Session 40).
- **User catches tangents as substrate improvement** — Probe 3 framing question on JPY-as-safe-haven was a user-driven substrate sharpening; honor and integrate.