The Walmart Effect is an economic phenomenon — named after the American retail giant Walmart — that describes the broad deflationary and competitive pressures exerted by the entry or dominance of a large, highly efficient, low-cost mass retailer in a market on prices, competitors, suppliers, employment conditions, and entire local economies. When a large-format discount retailer enters a market, it typically forces prices downward through its purchasing scale and supply chain efficiency, squeezes supplier margins through aggressive procurement negotiations, drives smaller competitors out of business, and restructures local retail employment. The Walmart Effect is a relevant concept for analysing the competitive dynamics in India's organised retail sector — particularly as large-format retailers, e-commerce giants (Flipkart, Amazon), and quick-commerce platforms reshape pricing, supply chains, and market share in Indian consumer markets. For investors on Ventura Securities evaluating retail sector stocks, FMCG companies, and consumer supply chain businesses, understanding the Walmart Effect provides a framework for assessing competitive moats, supplier pricing power erosion, and the long-term structural dynamics of India's rapidly evolving retail landscape.