Lawal, G. O.Aweda, N. O.Oyeyemi, G. M.2023-07-272023-07-272015American Journal of Mathematics and Statisticshttps://uilspace.unilorin.edu.ng/handle/20.500.12484/11618This paper employed the modified autoregressive distributed lag (ADRL) procedure to establish a univariate single level relationship existing between the Nigerian Stock Exchange (NSE) All-Share Index and three macroeconomic indicators such as Treasury bill rate, nominal exchange rate and inflation rate in Nigeria. A conditional restricted equilibrium correction model (ECM) was postulated with significant long-run relationship between NSE All-Share Index, exchange rate and inflation rate. The model relates exchange rate and inflation rate negatively with the All-Share Index in the long-run. Treasury bill rate have no long-run relationship with All-Share Index. The short-run dynamics indicated a negative causal relationship between All-Share Index and the three macroeconomic indicators. The results of this paper showed that All-Share index is slow to react to any disequilibrium caused by shocks on these macroeconomic indicators in the long-run. The 2008 global financial crisis had an insignificant negative effect on the NSE All-Share Index due to improved financial deepening. Monetary policy stability is crucial to price level control because inflation is a monetary phenomenon in Nigeria. Therefore, this paper proposed that the efficient use of Treasury bills as apparatus of monetary policy (inflation-targeting) and major source of government financing is essential to the growth of the Nigerian stock market. In addition to efficient monetary policy through interest rate and most importantly exchange rate, a secure fiscal discipline through effective government spending will likely have a positive effect on the All-Share Index rapidly and directly.enARDL, All-Share Index, Treasury bills, Nominal exchange rate, 2008 global financial crisis, Financial deepening, Inflation-targeting, Monetary policyArticle