Consumer spending patterns show significant regional variations, but the real insight lies at the margins. What truly matters is understanding how consumption behavior shifts when income changes. This marginal propensity to consume (MPC) is crucial during economic transitions. In some regions, even modest income increases trigger substantial spending boosts, while others show remarkable restraint. These differential responses reflect underlying economic structures, inflation expectations, and savings culture. During bull markets, we often see elevated consumption elasticity, whereas bear markets reveal how quickly households contract discretionary spending. Tracking these consumption-income dynamics helps predict broader economic cycles and asset class performance.