Financial news media shapes trillion-dollar climate investment decisions, yet discourse in this elite domain remains underexplored. We analyze two decades of climate-related articles (2000-2023) from Dow Jones Newswire using an Actor-Frame-Argument (AFA) pipeline that extracts who speaks, how issues are framed, and which arguments are deployed. We validate extractions against 2,000 human-annotated articles using a Decompositional Verification Framework that evaluates completeness, faithfulness, coherence, and relevance. Our longitudinal analysis uncovers a structural transformation: pre-2015 coverage emphasized risk and regulatory burden; post-Paris Agreement, discourse shifted toward economic opportunity and innovation, with financial institutions becoming dominant voices. Methodologically, we provide a replicable paradigm for longitudinal media analysis with LLMs; substantively, we reveal how financial elites have internalized and reframed the climate crisis across two decades.

翻译：金融新闻媒体影响着万亿美元规模的气候投资决策，然而这一精英领域的话语体系仍未得到充分探究。我们采用参与者-框架-论点（AFA）分析流程，对道琼斯新闻社2000-2023年间长达二十年的气候相关报道进行系统性分析，该流程能提取发言主体、议题构建方式及所运用的论证策略。我们通过包含完整性、忠实度、连贯性与相关性四个维度的分解式验证框架，在2000篇人工标注文章上对提取结果进行了验证。纵向分析揭示出结构性转变：2015年前的报道侧重风险与监管负担；《巴黎协定》后，话语体系转向经济机遇与创新，金融机构逐渐成为主导声音。方法论层面，本研究为大语言模型在纵向媒体分析中的应用提供了可复现的范式；实证层面，我们揭示了金融精英在二十年间如何内化并重构气候危机话语。