Typically, stocks tend to rise following a positive earnings report. However, Itau Unibanco Banco Holding's shares are trading lower, which could be due to various factors not mentioned in the article, such as market conditions, investor expectations, or other financial metrics that were not met. The better-than-expected Q4 revenue results make this a particularly interesting case for investors, suggesting a deeper analysis of the company's financial health and market position might be warranted.