The Columbia Total Return Municipal Income Fund experienced a mixed performance during the fourth quarter of 2025, with returns lagging its benchmark despite strategic positioning in certain areas. This period was marked by heightened political uncertainty and disruptions to economic data due to a federal government shutdown, influencing overall market dynamics. Understanding the factors that contributed to the fund's results provides valuable insights for investors.

For the three months ending December 31, 2025, the Institutional Class shares of the Columbia Total Return Municipal Income Fund posted a return of 1.31%. In contrast, its comparative benchmark, the Bloomberg Municipal Bond Index, achieved a return of 1.56% over the same timeframe. This differential indicates that the fund underperformed the broader municipal bond market during this particular quarter.

A detailed analysis of the fund's performance reveals that the primary reason for this underperformance stemmed from security selection, particularly within AA-rated bonds. Investment choices in this category did not yield the anticipated positive results, thus dragging down the fund's overall returns. However, not all aspects of the fund's strategy were detrimental. Positive contributions arose from the fund's yield curve positioning, which effectively capitalized on interest rate movements, and a favorable yield carry, which refers to the income generated from holding higher-yielding assets. These elements partially offset the negative impact of bond selection.

The broader economic environment in the fourth quarter of 2025 played a significant role. Elevated political uncertainty, culminating in a federal government shutdown, created an atmosphere of unpredictability. This shutdown not only disrupted the flow of crucial economic data but also introduced considerable uncertainty regarding future interest-rate expectations and overall risk markets. Such conditions can pose challenges for fixed income funds, as market sentiment and economic indicators heavily influence bond prices and yields.

Looking ahead, the fund's performance will be significantly shaped by its tactical decisions concerning curve and sector allocation. Projections include an elevated supply of municipal bonds, coupled with resilient credit quality and an environment that is generally favorable for yields. However, these positive drivers could be tempered by ongoing political and macroeconomic volatility, which remains a key consideration for investment managers. The fund's strategic allocation to intermediate and long maturities, alongside substantial holdings in AA, A, and BBB-rated bonds, reflects a continued effort to balance attractive yields with potential capital appreciation, even in a dynamic market.

The Columbia Total Return Municipal Income Fund's fourth-quarter 2025 results highlight the intricate interplay of security selection, market positioning, and macroeconomic factors. While specific bond choices led to underperformance relative to the benchmark, strategic decisions regarding the yield curve and yield carry provided cushioning. The period's political landscape further underscored the challenges of navigating uncertain market conditions. Moving forward, the fund aims to leverage its positioning in various maturity segments and credit qualities to optimize returns amidst anticipated market trends and potential volatilities.