The purpose of this study is to construct a Corporate Disclosure Index and examine if the score attained from the index acts as a proxy of Corporate Governance Quality. This Thesis examines if Corporate Governance Disclosure (CGD) score can serve as a proxy for Corporate Governance (CG) quality, thereby establishing a positive relationship with corporate financial performance. This Thesis gave insights that the corporate governance score does vary significantly across large, small and mid-cap companies in the selected sample of companies. It has been validated that there is statistically significant difference in the CGD scores question wise and dimension wise.