The study examines the exchange rate gap shock–stock market deepening nexus in
Nigeria using the structural VAR-X (SVAR-X) technique for the period 1986Q1 to
2018Q4. Findings reveal that exchange rate gap shock has a negative but statistically not significant effect on stock market deepening in Nigeria. It was also found
that exchange rate passed–through interest rate from second to thirteen quarter, and
further through financial openness whose effect, like exchange rate gap, was negative. This implies that exchange rate gap is significantly and negatively related to
interest rate and financial openness in Nigeria. It is therefore recommended that the
monetary authority should keep constant tab on the gap between official and parallel
market exchange rates as its widening can have a damaging effect on stock market
deepening. In addition, there is need to establish hedging instrument market to increase resilience of the stock market and improve stock market deepening in Nigeria.