- Background of the Study
According to Al-Faki (2006), the capital market is a “network of specialized financial institutions, series of mechanisms, processes and infrastructure that, in various ways, facilitate the bringing together of suppliers and users of medium- to long- term capital for investment in socio-economic developmental projects”. The capital market is divided into the primary and the secondary market. The primary market, or the new issues market, provides the avenue through which government and corporate bodies raise fresh funds through the issuance of securities that are subscribed to by the general public or a selected group of investors. The secondary market provides an avenue for the sale and purchase of existing securities.
A large pool of theoretical evidence exists locally and internationally showing that capital market growth boosts economic growth. Carlin and Mayer (2003) show that the capital market impacts economic growth, though not as strongly as the banking sector. Greenwood and Smith (1997) show that large stock markets can decrease the cost of mobilizing savings, thus facilitating investment in most productive technologies. Levine (1991) and Bencivenga, et al (1996) argue that stock market liquidity, which is the ability to trade equity easily and cheaply, is crucial for growth. Many profitable investments require a long-run commitment of capital but savers are reluctant to relinquish control of their savings for long periods. Liquid equity markets address this challenge by providing assets which savers can sell quickly and cheaply. Simultaneously, firms have permanent access to capital raised through equity issues. Kyle (1984) and Holmstrom and Tirole (1993) argue that liquid stock markets can increase incentives for investors to get information about firms and improve corporate governance while Obstfeld (1994) shows that international risk-sharing, through internationally integrated stock markets, improves resource allocation and can accelerate the rate of economic growth.
These arguments on the importance of stock market development in the growth process are supported by various empirical studies, such as Levine and Zervos (1993, 1996, and 1998); Atje and Jovanovic (1993), and Demirguc-Kunt (1994). Filer, et al (1999) find that an active equity market is an important engine of economic growth in developing countries. Rousseau and Wachtel (2002) and Beck and Levine (2002), show that stock market development is strongly correlated with growth rates of real GDP per capita, and that stock market liquidity and banking development both predict the future growth rate of the economy when they both enter the growth regression.
Stock exchanges exist for the purpose of trading ownership rights in firms, and are expected to accelerate economic growth by increasing liquidity of financial assets, making global risk-diversification easier for investors, promoting wiser investment decisions by savings-surplus units based on available information, compelling corporate managers to work harder in shareholders’ interests, and channeling more savings to corporations (Greenwood and Jovanovic, 1990 and King and Levine, 1993). In accord with Levine (1991), Bencivenga, et al (1996) emphasise the positive role of liquidity provided by stock exchanges on the size of new real asset investments through common stock financing. Investors are more easily persuaded to invest in common stocks when there is little or no doubt on their marketability in stock exchanges. This, in turn, motivates corporations to go public when they need more finance to invest in capital goods.
Stock prices determined in exchanges, and other publicly available information, help investors make better investment decisions. Better investment decisions by investors mean better allocation of funds among corporations and, as a result, a higher rate of economic growth. In efficient capital markets, prices already reflect all available information, and this reduces the need for expensive and painstaking efforts to obtain additional information (see, Stiglitz, 1994).
On a broader scope on the debate on whether financial development engenders economic growth or whether financial development is consequential upon increased economic activity, Schumpeter (1912) opined that technological innovation is the force underlying long-run economic growth, and that the cause of innovation is the financial sector’s ability to extend credit to the “entrepreneur” (Filer, et al, 1999) while Robinson (1952) claims that it is the growth of the economy that causes increased demand for financial services which, in turn, leads to the development of financial markets.
According to Rosseau and Wachtel (2002), mature financial systems can cause high and sustained rates of economic growth, provided there are no real impediments to growth. Carlin and Mayer (2003) also find a positive link between financial system development and economic growth in developed countries. Greenwood and Smith (1996) show that stock markets lower the cost of mobilizing savings, thereby facilitating investments in the most productive technologies. Levine and Zervos (1998) find a positive and significant correlation between stock market development and long-run growth. Bencivenga, et al (1996) and Levine (1991) argue that stock market liquidity plays a key role in economic growth, stressing that profitable investments require long-run commitment of capital but savers prefer not to relinquish control of their savings for long periods, and liquid equity markets ease this tension by providing assets to savers that are easily liquidated at any time.
Kyle (1984) argues that an investor can profit by researching a firm and obtain vital information before it becomes widely available and prices change. Thus, investors will be more likely to research and monitor firms. To the extent that larger, more liquid stock markets increase incentives to research firms, the improved information will improve resource allocation and accelerate economic growth. The role of stock markets in improving informational asymmetries has been questioned by Stiglitz (1985), who argues that stock markets reveal information through price changes rapidly, creating a free-rider problem that reduces investors’ incentives to conduct costly search.
Levine and Zervos (1998) examine, empirically, the issue of whether stock markets are merely burgeoning casinos, as asserted by Keynes (1936), or a key to economic growth, and find a positive and significant correlation between stock market development and long-run growth. Sarkar (2007), however, criticised their use of cross-sectional approach because it limits the potential robustness of their findings with respect to country-specific effects and time-related effects. Akinlo (2008) adds that they did not address the issue of causality, etc.
Akinlo (2008) investigates the causal relationship between stock market development and economic growth in Nigeria during the period, 1980-2006. The study shows that gross domestic product (GDP) and stock market development are co-integrated, and that there is only one uni-directional Granger causality running from GDP to market capitalization. Nwaogwugwu (2008), however, reveals a strong bi-directional causation between economic growth and stock market development, defined in terms of market capitalization and volume of transactions, in Nigeria from 1989-2007. Ujunwa and Salami (2010) find that stock market size and turnover ratios are positive in explaining economic growth while stock market liquidity coefficient was negative in explaining long-run growth in Nigeria between 1986 and 2006.
Most of the research works on capital market development and economic growth have been based on the ‘supply-leading’ hypothesis and few on the ‘demand-following’ hypothesis, as postulated by Patrick (1966). The supply-leading hypothesis claims a causal relationship from financial development to economic growth such that the intentional creation and development of financial institutions and markets would increase the supply of financial services, which would lead to economic growth (King and Levine, 1993a, b; Levine and Zervos, 1998; and Demirguc-Kunt and Maksimovic, 1996).
Little literature are available on the demand-following hypothesis which claims that it is the growth of the economy that causes increased demand for financial services which, in turn, leads to the development of financial markets (see, Robinson, 1952 and Lucas, 1988).
This study seeks to fill this knowledge gap, that is, to explore the impact of capital market development on Nigeria’s economic growth from the demand-following argument that it is the growth of the Nigerian economy that has promoted the development of the capital market, hence a test of reverse causation.
- Statement of the Problem
Alile (1998) describes the capital market as the major vehicle (or mechanism) for mobilizing long-term funds for investment purposes. The Nigerian economy has generally been growing over time, just as the Nigerian capital market. The challenge, which this work is intended to undertake, is to determine the influence of the nation’s economic growth on the development of the capital market, which was established in 1961 to provide and sustain the capital requirements of the Nigerian economy, in the growth matrix.
A nation’s growth, economically, is expected to promote an efficient and effective financial sector that pools domestic savings and mobilises capital for productive purposes. Hence, an economy that is not growing can hinder stock market development, and engender such problems as:
- Low capitalization, which limits the savings function of the stock market; and
- Illiquidity of the stock market to promote investment
The capital market connects the financial sector with the real sector of the economy and, in the process, facilitates real sector growth and economic development. The fundamental channels through which the capital market is connected to economic growth can be outlined as follows: the capital market increases the proportion of long-term savings (pensions, etc) that are channeled to long-term investments; the capital market enables contractual savings industry (pension and provident funds, insurance companies, medical aid schemes, collective investment schemes) to mobilise long-term savings from individuals/households and channel them into long-term investments. It fulfills the transfer function of current purchasing power from surplus sectors to deficit sectors, in exchange for reimbursing a greater purchasing power in the future. In this way, the capital market enables corporations raise funds to finance their investments in real assets.
The implication will be an increase in productivity within the economy leading to more employment, increase in aggregate consumption and, ultimately, growth and development. It also helps in diffusing stresses on the banking system by matching long-term investments with long-term capital. It encourages broader ownership of productive assets by small savers. It enables them to benefit from economic growth and wealth distribution, and provides avenues for investment opportunities that encourage a thrift culture critical in increasing domestic savings and investment ratios that are essential for rapid industrialization. When the economy is not developed, however, its size may not support the growth and development of the stock market.
According to Ezeoha, et al (2009), the liquidity role of the stock market stands out clearly as the most significant, among its numerous functions. Citing Levine (1991, 1997), they concur that without a liquid stock market, many profitable long-term investments would not be undertaken because savers may be reluctant to tie up their investments for long periods of time. The stock market mainly provides liquidity by enabling firms to raise funds through the sale of securities cheaply, easily and speedily. Through this catalyst role, the stock market is also able to influence investment and economic growth in general.
Filer, et al (1999) argue that an active stock market is crucial in reallocating capital in developing countries such that, in the absence of such markets, growth in low and middle income countries would be substantially lower than it could have been if such active stock exchanges were present. Mohtadi and Agarwal (2004) argue that large stock markets lower the cost of mobilizing savings and also facilitate investments in the most productive technologies. Arestis, et al (2001), Applegarth (2004) and Osei (2005) insist that it is the development of the stock market that spurs growth in the economy but Yartey (2008) and Akinlo (2008) disagree, arguing that the level of economic activities in a country constitute the key drivers of stock market development in that country.
These contentions, and the need to clarify them, prompted Gugliemo, et al (2004) to assert that the nexus of stock market development and economic growth is not universally clear and, hence, it becomes crucial to investigate this as it reveals the extent of efficiency in capital allocation of an economy and Nurudeen (2009), who, though, finds that stock market development increases economic growth in Nigeria, to posit a resort to empirical investigations to resolve the issue but none of the empirical examinations has been able to resolve the controversy which, according to Ezeoha, et al (2009), boils down to the paradox of the egg and the hen, which is older?
Previous studies on the link between capital market development and economic growth focused on Patrick’s (1966) supply-leading hypothesis but our study seeks to find out if the reverse is the case, that is, if it is the growth in Nigeria’s economy that has influenced the development of the nation’s capital market, in line with Patrick’s (1966) demand-following hypothesis.
A capital market, according to Nigeria’s Securities and Exchange Commission (SEC), is a financial market which trades in medium- to long-term financial instruments (stocks and bonds) with maturity in excess of one year. It is a network of participants, instruments and facilities which functions basically to facilitate, efficiently, the flow of savings into long-term investments for socio-economic development (Udora, 2004). It is the major engine of growth and development for any economy, and it accommodates certain institutions for the creation, custodianship, distribution and exchange of financial assets and management of long-term liabilities (Osaze, 2001).
On the other hand, economic growth is an increase in an economy’s ability to produce real goods and services (Baye and Jansen, 1995). It is about the enhancement of an economy’s productive capacity by employing available resources to reduce risks, remove impediments which, otherwise, could lower costs and hinder investment (Sanusi, 2011). It is related to a quantitative sustained increase in a country’s per capita output or income accompanied by expansion in its labour force, consumption, capital and volume of trade (Jhingan, 2007).
1.3 Objectives of the Study
The main objective of this study is to determine the impact of economic growth on capital market development while, specifically, this study sets out to achieve the following objectives:
- To examine the impact of economic growth on the Nigerian Stock Exchange market capitalization ratio;
- To examine the impact of economic growth on the Nigerian Stock Exchange turnover ratio;
- To examine the impact of economic growth on the Nigerian Stock Exchange value traded ratio;
- To examine the impact of economic growth on the new issues traded ratio in the Nigerian Stock Exchange;
- To examine the impact of economic growth on the number of listings in the Nigerian Stock Exchange;
- To examine the causal relationship between economic growth and capital market development indicators in Nigeria.
1.4 Research Questions
As a follow-up to the above objectives, the research questions for this study are:
- To what extent does economic growth have positive and significant impact on the Nigerian Stock Exchange market capitalization ratio?
- To what extent does economic growth have positive and significant impact on the Nigerian Stock Exchange turnover ratio?
- To what extent does economic growth have positive and significant impact on the Nigerian Stock Exchange value traded ratio?
- To what extent does economic growth have positive and significant impact on the new issues in the Nigerian Stock Exchange?
- To what extent does economic growth have positive and significant impact on the number of listings in the Nigerian Stock Exchange? and
- To what extent is there a causal relationship between economic growth and the Nigerian Stock Exchange market development indicators?
1.5 Research Hypotheses
To empirically examine the questions raised above, the following are the study’s research hypotheses:
- Economic growth does not have a positive and significant impact on market capitalization ratio in the Nigeria Stock Exchange;
- Economic growth does not have a positive and significant impact on turnover ratio in the Nigerian Stock Exchange;
- Economic growth does not have a positive and significant impact on value traded ratio in the Nigerian Stock Exchange;
- Economic growth does not have a positive and significant impact on the new issues ratio in the Nigerian Stock Exchange;