TCAI is trading at $47.29, down 1.72%, amid weaker broader risk sentiment; no TCAI-specific announcement or catalyst was identified for September 28. - TCAI is the Tortoise AI Infrastructure ETF. Renewed U.S.-Iran tensions and rising oil prices coincide with weaker risk sentiment; major U.S. indexes are also lower in the supplied pre-market context. - OpenAIβs model-training pause is a notable AI headline, but available sources do not establish that it caused TCAIβs decline.