Humayun Humta - Department of Accounting and Finance, Selçuk University, Konya, Turkey
Hamayoun Ghafourzay - Department of Accounting and Finance, Kabul University, Kabul, Afghanistan

Internal and external finance are the two primary forms of funding for businesses. Internal financing is derived from retained profits, while external financing may come through borrowing money or the issuance of stocks. Businesses utilize it constantly to grow and stay alive, so the choices they make about finance are crucial. Market timing is vital for determining the appropriate financial structure for a company's success because volatility in market valuation greatly affects the capital structure. Capital structure requires a decision-making tactic that is an art to tackle complex situations. Modigliani and Miller started this ground-breaking study on capital structure in the field of corporate finance in ۱۹۵۸. After that, several theories were developed, but one of those theories was the market timing theory of capital structure, which explains that firms issue new stock when their share price is overvalued and repurchase shares when their share price is undervalued. These price fluctuations of equity will affect corporate financing decisions and ultimately corporate capital structures. The goal of this study is to test the applicability of market timing theory in the context of Canadian firms; thus, the data have been collected from the FINVIZ Stock Screener for the period (۲۰۲۲) and analyzed by a generalized linear model technique through the EViews ۱۳. The research concludes that the market-to-book ratio has a statistically significant negative effect on market leverage as well as book leverage.

Canadian Firms, Capital structure, High Valuation, Market Timing Theory, market to book ratio