The neural underpinnings of financial behaviour using modified Iowa Gambling Task (IGT) was assessed through fMRI technique. Data was processed using SPM 12. The results reveal differential brain activation in fronto-parietal lesion patients (n=3, mean age: 47 ±12 years) with respect to controls (n=6, mean age:42±17years). IGT results demonstrated activations during experience of majorly four conditions viz. gains, losses, draws and penalty. The decision-making and associated tasks invoked memory, attention and execution networks providing the insights about the underlying structures of financial investment behaviour.