ResearchResearch paperLarge Language Models · Efficiency & Inference · Business, Funding & Industry1 source · Oct 19, 2026

Fake News, Real Crashes: Information Injection Attacks on LLM Financial Trading Agents

We present a systematic attack benchmark for information injection against LLM trading agents.

Key points

  • Large language model (LLM) agents now trade real capital using news as evidence, yet they cannot reliably tell fabricated headlines from real news.
  • Because they read the same feeds under near-identical policies, a single fabricated post can push them into the same trade at the same moment.
  • Unlike prompt injection, which targets the model's instructions, information injection targets the evidence the agent trusts.
  • The benchmark spans five injection vectors and seven event categories, evaluated over 10,000 decisions on 15 U.S. stocks.

Sources (1)

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Before this

  1. Oct 19, 2026Productive State-Space Exploration for Multi-turn RL in LLM Agents
  2. Oct 19, 2026AdaExploreBench: Benchmarking LLM Agents for Proactive Exploration and Test-time Adaptation in Evolving Environments
  3. Oct 18, 2026SoK: PIAtlas: Decomposing the Unbounded Prompt Injection Attack Space
  4. Oct 17, 2026AgentSoV: Virtual Sensing for LLM Multi-Agent Systems via Stream of Variation
  5. Oct 17, 2026Pair-Aware Optimization: Coordinating Exploration and Refinement for Jailbreaking LLM Agents
  6. Oct 16, 2026SPIDES: Information-Flow Control for Browser Agents

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