black-swan-playbook-for-halted-markets SKILL.md skillA
black-swan-playbook-for-halted-markets from himanshuj16/algo-trading-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add himanshuj16/algo-trading-skills/black-swan-playbook-for-halted-markets@v3.0.0Pins v3.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- himanshuj16/algo-trading-skills
- Path
skills/black-swan-playbook-for-halted-markets/SKILL.md- Versions recorded
- 5
- Latest version
- v3.0.0, committed Sep 3, 2026
- First version recorded
- Jul 25, 2026
- Size
- 9,028 bytes
- Repository stars
- 50
- License
- Apache-2.0
Use when a venue disseminates a LULD pause or market-wide circuit breaker on a symbol you hold; covers order lockdown, risk-limit expansion and notional-scaled basis-risk-aware proxy hedging, with no proxy hedge during a market-wide halt.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## When to Use Invoke this skill during Black Swan events, elevated market volatility, or whenever an exchange disseminates a `HALTED_LULD` or `HALTED_CIRCUIT_BREAKER` status for traded symbols. Standard "Gaussian" risk models and naïve algorithmic retries fail catastrophically during microstructure breakdowns. This skill automates the institutional response: 1. Avoiding trapped capital by cancelling pending limit/stop orders. 2. Expanding risk parameters for extreme volatility regimes. 3. Deploying notional-scaled proxy hedges (filtered by basis risk) to protect delta while the primary asset is frozen — but only when a proxy is actually tradable. 4. Intelligently liquidating or rebalancing positions during re-opening auctions at model-derived fair value. ## When NOT to Use - **During a market-wide circuit breaker, for hedging purposes.** The engine still performs order lockdown and risk-limit expansion, but it deliberately emits no proxy hedge: a US MWCB halts every NMS security (including SPY/QQQ) and CME coordinates a simultaneous halt of all US-based equity index futures and options, so no proxy exists to trade. `HaltedMarketReport.hedge_suppression_reason` records this. …
Read the whole file at its exact version.
How to install
mdr add himanshuj16/algo-trading-skills/black-swan-playbook-for-halted-markets@sha256:f1eef7daa713d7d0The line at the top of this page pins the label v3.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yk3isvfqnhx2dyfg)
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Versions
The registry has recorded 5 versions of this file, between Jul 25, 2026 and Sep 3, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v3.0.0 latest | 2026-09-03 | 8527a51 | 9,028 B | A | view · diff |
| v3.0.0 | 2026-08-13 | 746a971 | 9,078 B | A | view · diff |
| v2.0.0 | 2026-08-07 | 89d1436 | 3,996 B | A | view · diff |
| v2.0 | 2026-07-30 | dfc60c7 | 3,980 B | A | view · diff |
| v2.0 | 2026-07-25 | 777afdb | 3,991 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9028 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
himanshuj16/algo-trading-skills · 50 stars · license Apache-2.0 · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yk3isvfqnhx2dyfg GET https://markdownregistry.com/api/v1/resolve?ref=himanshuj16/algo-trading-skills/black-swan-playbook-for-halted-markets GET https://markdownregistry.com/api/v1/blob/f1eef7daa713d7d0800d7343c75934482bdb5b5426db5c81d7a68a0a6b3be99f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.