Weather Arbitrage Bot Surfaces; Spain Blocks Polymarket Entirely

Weather Markets Are Leaking — and Someone Built a Bot for It

The standout find today is `polymarket-weather-edge`, a statistical arbitrage bot targeting weather outcome markets. The strategy is clean: when the bot's underlying probability model diverges from the on-chain price, it sells overpriced YES by buying NO. Weather markets on Polymarket have historically attracted retail flow driven by vibes rather than models, making them a structurally exploitable venue for anyone with even a basic meteorological data feed. This one is worth cloning and adapting. The core logic — model vs. market price, fade the gap — is transferable to any domain where you can build a calibrated prior that the market consistently misprices.

New Bots This Week: 4 Worth Your Time

**`predmarket`** — Not a trading bot but infrastructure. It exposes a unified API layer for data integration and simulation across prediction market platforms. If you're running multiple strategies or building a backtesting harness, this is foundational plumbing worth pulling into your stack.

**`polymarket-tui`** — A terminal UI for manual trading and market monitoring. Fast, keyboard-driven, no browser overhead. Operators who spend time watching order books will find this materially faster than the web interface. Worth cloning purely as a monitoring tool.

**`polymarket-weather-edge`** — Covered above. Clone it.

**`polymarket-insider-bot`** — Flagged as monitor, not clone. Strategy is underspecified — likely some form of market data analysis feeding automated order execution, but there's not enough signal in the repo to confidently characterize the edge. Watch it for a week before touching the code.

**`polychan`** — Skip. LLM-driven decision-making for trade execution sounds compelling until you examine the latency profile and the cost of inference at any meaningful trade frequency. No demonstrated edge, no backtests visible. Pass.

Security: One Malware Template, One Active Spam Campaign

Critical call-out: a **460KB exact-size cloned malware template** is circulating. The signature here is the file size — 460KB is a known fingerprint for a repackaged credential-harvesting template that has been re-skinned as a Polymarket bot. If you've downloaded any new bot repos in the last 72 hours, check your file sizes. Do not run anything matching that footprint in an environment with live wallet access. Verify source repos against original commit histories before execution.

Separately, a **star-farming campaign targeting Telegram whale bot channels** has been flagged twice in today's data — two independent reports of the same campaign, suggesting it's actively running. Star counts on Telegram bots are being artificially inflated to manufacture social proof. Do not use star count as a trust signal this week.

Alpha Signals: Three Papers Worth Reading

**Negative-risk arbitrage is executable.** A new research paper draws the critical distinction between theoretical no-arbitrage (which always holds in winner-takes-all markets mathematically) and *protocol-executable* no-arbitrage, which depends on what position transformations Polymarket actually allows. The finding: linked binary markets can violate executable no-arbitrage in observable, tradeable ways. If you're not already running negative-risk strategies on correlated outcome pairs, this paper is the theoretical justification to start.

**Agentic market clustering.** A pipeline that uses language models to cluster prediction markets by topic and surface implicit equivalences, hidden contradictions, and overlaps across fragmented contracts. The practical application: finding markets where two contracts are semantically equivalent but priced differently. That's a direct arbitrage signal. The tooling isn't productionized yet but the approach is sound.

**LLM merger arbitrage.** A finetuned language model system for M&A deal outcome prediction, handling long-context reasoning over merger agreements and regulatory filings. Merger markets on Polymarket are thinly traded but the spreads are wide. A system with genuine informational edge in regulatory outcomes could extract meaningful value here with modest capital.

What to Watch

Spain's block of Polymarket and Kalshi is the regulatory story of the week — 1,083 upvotes on HN signals this has mainstream attention now. Watch for copycat regulatory actions in other EU jurisdictions. The Iran missile death threat story (1,606 points) is a reminder that large positions in geopolitical markets carry personal security implications that most operators don't model. And keep watching the `polymarket-insider-bot` repo — if the strategy clarifies over the next week, it may move from monitor to clone.