CHAPTER ONE

INTRODUCTION

1.1 Background to the Study

Asset price bubbles and the crashes that follow them have long attracted academic attention. Theoretical work shows that a bubble can persist even when rational arbitrageurs are present, because traders cannot coordinate the timing of their selling (Abreu & Brunnermeier, 2003). Other work shows that deviations from present-value pricing can arise from a bubble that depends only on dividends, an "intrinsic" bubble whose variability comes entirely from fundamentals (Froot & Obstfeld, 1991). Bubbles have also been reproduced in experimental markets in which the stream of dividends is known and uncertainty has been removed (Smith et al., 1988). Their existence is therefore difficult to reconcile with the Efficient Market Theory, which assumes rational investors and prices that track intrinsic value.

History offers well-known examples, from the Dutch tulip mania of the 1630s and the South Sea bubble of 1719 to 1720 to the dot-com bubble of the late 1990s. The technology-heavy NASDAQ Composite peaked at 5,048.62 on 10 March 2000. By October 2002 it had lost about 78 per cent of its value, wiping out roughly $5 trillion in market value (International Banker, n.d.). Episodes of this kind show how difficult it is for analysts and investors to anticipate turning points, and why the causes of any particular crash need to be investigated within its own context.

Crashes impose real costs. They destroy wealth, discourage investment, weaken investor confidence and can trigger capital outflows and a credit squeeze that prolongs the downturn. For this reason, understanding the forces that determine stock prices matters to investors, regulators and policymakers alike. The stock market is widely regarded as a barometer of national economic performance, and it contributes to development by mobilising long-term capital for firms and governments, encouraging diversification of investment and supporting privatisation programmes.

In Nigeria, an extensive literature examines how macroeconomic fundamentals relate to stock prices. Adaramola (2014) analysed quarterly data from 1985 to 2009, at both market and firm level, and found a long-run relationship between macroeconomic variables and stock prices in Nigeria. More recent studies have examined the roles of exchange rates, inflation and monetary policy (Adewale, 2025; Agunobi et al., 2024; Akanbi, 2025; Kolawole, 2025; Nwankwo & Gado, 2024; Uguru et al., 2024; Yusuf et al., 2025), and the possibility that macroeconomic variables affect the market asymmetrically (Sabo, 2025). Their findings differ with the period, the variables and the estimation technique used. Using the All-Share Index (ASI) as the measure of market performance, Adewale (2025) reports a statistically significant, positive long-run effect of the exchange rate on the index for 1990 to 2023. Uguru et al. (2024), using an EGARCH model for 1981 to 2022, find that stock prices react negatively to exchange rate fluctuations. This divergence suggests that the relationship between fundamentals and prices is not stable across periods and requires careful empirical treatment.

The Nigerian market's experience between 2004 and 2009 illustrates the point. Following the banking consolidation of 2004, banks expanded credit rapidly and extended large volumes of margin loans for the purchase of shares, which contributed to a five-fold increase in the total capitalisation of the stock market between 2004 and 2007. The ASI reached a peak of about 66,000 points in March 2008 and then fell by roughly 70 per cent over the following twelve months (Yale Program on Financial Stability, n.d.). Banks had also inflated their own share prices by lending to individuals and companies to buy their shares, and the ASI had fallen to about 20,800 points by December 2009 (Financial Nigeria, n.d.). The domestic crash was therefore compounded by the global financial crisis, and banks' exposure to both margin lending and oil sector lending produced a high level of non-performing loans (Yale Program on Financial Stability, n.d.).

More recent evidence on whether Nigerian prices have departed from fundamentals is mixed. Ilyasu and Saba (2019), using monthly ASI data from 2010 to 2017 and a Sup-ADF date-stamping approach, concluded that the behaviour of stock prices on the exchange was not driven by a bubble. This suggests that the question of how far prices reflect fundamentals depends on the period examined, and the boom and bust of 2004 to 2008 remains an important case. The present study contributes to this debate by analysing the interrelationship between stock market variables, microeconomic (firm-level) fundamentals and macroeconomic fundamentals, and their impact on stock pricing in Nigeria.

1.2 Statement of the Problem

Between 2004 and early 2008, the Nigerian capital market recorded exceptional growth. The banking consolidation, together with rising oil revenues, expanded credit and brought a surge of activity to the market. Share prices rose sharply, returns exceeded those of alternative investments, and market capitalisation reached record levels. From March 2008, however, the market reversed. The ASI and market capitalisation fell steeply, and the decline, among the sharpest in the exchange's history, eroded investor confidence and affected banks that had lent heavily against shares (Financial Nigeria, n.d.; Yale Program on Financial Stability, n.d.).

Explanations for the crash vary. Some commentators argue that the market was overvalued and was correcting itself. Others argue that prices had not yet reached their fundamental values and that the decline was temporary. Still others point to the global financial crisis, to margin lending, or to the concentration of the market in bank stocks. Few of these explanations have been tested systematically against data on market, firm-level and macroeconomic variables. While the Nigerian market has attracted less critical research than the markets of developed countries, the 2008 crash in particular has received little rigorous, evidence-based assessment. Recent studies concentrate mainly on how single macroeconomic variables, such as the exchange rate or the monetary policy rate, relate to stock market performance, and they do not examine jointly the interrelationship between market variables, firm-level fundamentals and macroeconomic fundamentals during the boom and bust period.

This gap matters for policy. If policy positions do not reflect the actual causes of market movements, similar episodes are more likely to recur. This study therefore examines the relative roles of stock market, microeconomic and macroeconomic fundamentals, and of possible bubbles, in determining stock prices in Nigeria. The All-Share Index is used as the main measure of market activity.

1.3 Objectives of the Study

The main objective of the study is to provide empirical evidence on the determinants of stock prices in Nigeria and on the causes of the stock market crisis of 2008. The specific objectives are to:

1. examine the relationship between stock market valuation and macroeconomic fundamentals in Nigeria;
2. examine the relationship between stock prices and microeconomic (firm-level) fundamentals;
3. analyse the interrelationship among stock market variables, microeconomic fundamentals and macroeconomic fundamentals in determining stock prices;
4. determine whether stock price movements since 2004 followed economic fundamentals or reflected speculative and other bubbles, and assess the causes of the crisis in the Nigerian stock market; and
5. evaluate the effect of the crisis on investor confidence in the market.

1.4 Research Questions

The study is guided by the following research questions:

1. Do stock prices in the Nigerian stock market adequately reflect the underlying fundamentals of firm performance and overall economic activity?
2. What is the nature of the interrelationship among stock market variables, microeconomic fundamentals and macroeconomic fundamentals in the determination of stock prices in Nigeria?
3. What were the root causes of the crisis in the Nigerian stock market?
4. To what extent did the crisis affect investor confidence?

1.5 Research Hypotheses

A hypothesis is a specific, testable statement of what the researcher expects to find. The following hypotheses, stated in null form, guide the study:

H₀₁: Economic fundamentals (stock market, microeconomic and macroeconomic) do not significantly drive stock prices in the Nigerian stock market.

H₀₂: The crisis in the Nigerian stock market was not caused by stock prices deviating from their fundamental values.

H₀₃: Investor confidence was not significantly affected by the crisis in the Nigerian stock market.

1.6 Scope and Limitations of the Study

Scope

The study covers firms quoted on the Nigerian Stock Exchange, now the Nigerian Exchange Group (Adewale, 2025). It uses monthly data from January 2004 to December 2008. It is concerned with the effect of selected indicators on stock price movements and does not examine reverse causality, that is, the effect of the crisis on other macroeconomic variables such as inflation and output growth.

Limitations

Empirical research in Nigeria is constrained by the availability and reliability of data, by funding and by time. To address these constraints, the study applied the following measures:

• Data disaggregation techniques, such as interpolation, were used where higher-frequency data were unavailable. This may introduce some bias into the estimates.
• Data were drawn from several sources. Because this creates comparability problems, the data were evaluated carefully to ensure consistency and thoroughness.
• Available resources, including time, were used as efficiently as possible to maintain the quality of the research.

1.7 Significance of the Study

The study has both academic and policy significance. It:

• adds to the literature on the determinants of stock prices and the causes of stock market crises in developing countries, with particular attention to Nigeria;
• provides a reference point for future research on the subject;
• informs policy on the stock market by clarifying the relative roles of firm-level fundamentals, market regulation and macroeconomic management in determining market movements;
• benefits investors, regulators, policymakers and other stakeholders by relating market trends to key economic indicators in a systematic, empirical way; and
• is relevant to a wide audience, including government and other participants in the Nigerian economy.

References

Abreu, D., & Brunnermeier, M. K. (2003). Bubbles and crashes. Econometrica, 71(1), 173–204. https://doi.org/10.1111/1468-0262.00393

Adaramola, A. O. (2014). The impact of macroeconomic variables on stock prices in Nigeria [Doctoral thesis, University of Lagos]. https://ir.unilag.edu.ng/handle/123456789/4127

Adewale, A. A. (2025). Effect of monetary policy rates and inflation on the Nigerian Exchange Group (NGX). Kerbala International Journal of Management and Economics, 13(48).

Agunobi, C. C., Efionayi, O. P., & Akutson, S. (2024). Effect of macroeconomic variables on stock market performance in Nigeria. Journal of Global Economics and Business, 5(18), 186–210. https://doi.org/10.58934/jgeb.v5i18.280

Akanbi, A. (2025). Macroeconomic factors and stock market performance based on new evidence: A case study from Nigeria. Asian Journal of Economics, Business and Accounting, 25(2), Article 1680. https://doi.org/10.9734/ajeba/2025/v25i21680

Financial Nigeria. (n.d.). Banks are selling shares again. https://financialnigeria.com/banks-are-selling-shares-again-feature-562.html

Froot, K. A., & Obstfeld, M. (1991). Intrinsic bubbles: The case of stock prices. American Economic Review, 81(5), 1189–1214.

Ilyasu, J., & Saba, N. D. (2019). Testing for single bubble episode in the Nigerian stock market: An empirical investigation. CBN Journal of Applied Statistics, 10(1), Article 2. https://dc.cbn.gov.ng/jas/vol10/iss1/2

International Banker. (n.d.). The dotcom bubble burst 2000. https://internationalbanker.com/history-of-financial-crises/the-dotcom-bubble-burst-2000/

Kolawole, K. D. (2025). Macroeconomic variables and stock market performance in Nigeria. Gusau Journal of Accounting and Finance, 6(2), 284–294. https://doi.org/10.57233/gujaf.v6i2.18

Nwankwo, I., & Gado, N. D. (2024). Effect of macroeconomic variables on the performance of the Nigerian capital market. Journal of Management and Economic Studies, 6(4). https://doi.org/10.26677/TR1010.2024.1482

Sabo, A. Y. (2025). The asymmetric effects of macroeconomic variables on the Nigerian stock market. Kashere Journal of Management Sciences, 8(1), 55–80.

Smith, V. L., Suchanek, G. L., & Williams, A. W. (1988). Bubbles, crashes, and endogenous expectations in experimental spot asset markets. Econometrica, 56(5), 1119–1151.

Uguru, N. E., Enwere, G. M., & Amos, W. (2024). The nexus between exchange rate volatility and Nigerian stock prices: An EGARCH approach. African Journal of Economics and Sustainable Development, 7(1), 56–72. https://doi.org/10.52589/AJESD-ATAK411M

Yale Program on Financial Stability. (n.d.). Asset Management Corporation of Nigeria (AMCON): Broad-based capital injections. https://newbagehot.yale.edu/docs/asset-management-corporation-nigeria-amcon-capital-injections

Yusuf, A., Gwadabe, M., & Ukashatua, A. Y. (2025). Analysis of the impact of key macroeconomic variables on stock market development in Nigeria. FUDMA Journal of Accounting and Finance Research, 3(1), 160–175.