Product Diversification Strategies and Financial Performance of Commercial Banks Listed at Nairobi Securities Exchange, Kenya

Abstract

Commercial banks in Kenya face intense competition, declining interest income, stringent regulations, and rapidly changing market conditions. To sustain profitability and enhance resilience, these banks have increasingly adopted product diversification strategies. However, there is limited empirical evidence on how specific approaches—concentric, horizontal, and conglomerate diversification—affect the financial performance of commercial banks listed on the Nairobi Securities Exchange (NSE), or whether organizational culture mediates these relationships. This study addresses this gap by examining both the direct effects of diversification strategies on financial performance and the potential mediating role of organizational culture. Grounded in Dynamic Capabilities Theory, the research explores how banks leverage and adapt internal resources to exploit market opportunities, respond to competition, and maintain strategic flexibility. The study adopted a positivist philosophy and descriptive-correlational design, targeting 132 senior management employees across all eleven NSE-listed banks, focusing on those responsible for strategic planning, product development, and financial oversight. Stratified random sampling produced 99 respondents, ensuring proportional representation across banks and departments. Primary data were collected using a structured questionnaire measuring the extent of diversification strategy adoption, perceptions of organizational culture, and key financial performance indicators. Descriptive statistics summarized the prevalence and intensity of each diversification strategy, while multiple linear regression analysis assessed their effect on financial performance. Mediation analysis, following Baron and Kenny’s steps, determined whether organizational culture influenced the relationship between diversification and financial outcomes. Key performance indicators included Return on Assets, Gross Profit Margin, and Net Profit Margin. Diagnostic tests confirmed the data met assumptions of normality, linearity, homoscedasticity, and absence of multicollinearity. The findings revealed that all three diversification strategies positively and significantly influenced financial performance. Concentric diversification was the strongest predictor (B = 0.403, p<.05), indicating that banks expanding into related products and services by leveraging existing competencies and customer relationships achieved the greatest financial gains. Horizontal (B = 0.239, p<.05) and conglomerate diversification (B = 0.229, p<.05) also contributed positively, though to a lesser extent, suggesting that venturing into unrelated services or industries offers supplementary advantages. Mediation analysis showed that organizational culture did not significantly transmit or alter the effects of diversification strategies, implying that while culture supports adaptability and alignment, the execution of diversification strategies is the primary driver of financial performance. The study recommends that bank executives prioritize concentric diversification for maximum profitability, while selectively implementing horizontal and conglomerate strategies to enhance resilience and market positioning. Policymakers are encouraged to support regulatory frameworks that facilitate innovation and strategic flexibility. This research adds to the empirical evidence on product diversification in Kenya’s banking sector, highlighting the primacy of operational execution over cultural factors in achieving superior financial outcomes.