Market Efficiency Tests: Five Anomalies Exist in Both Us and Australian Markets
Executive summary
Market efficiency tests include weak, semi-strong and strong three forms. They assume that financial markets are "informationally efficient", or that prices of trading assets, already reflect all known information and therefore are unbiased in the sense that they reflect the collective beliefs of all investors about future prospects. The weak form test is based on the past information and public available information for semi-strong while strong form covers not only the public but also the private information.
Five market anomalies that appeared in U.S. and Australian equity market are discussed. They are Book-to-market ratio, January effect, small firm effect, weekend and temperature effect. The small firm effect seems to be disappeared in the US market in recent years and existed in Australia until 1994. January effect is vanishing in both US and Australian market. There is a statistically significant negative correlation between stock returns and temperature is found in both U.S and Australian equity market and theory of stock returns and temperature turned out to be true. In contrast to US market, Australian stock markets appeared to exhibit a Tuesday effect rather than Monday effect (Weekend effect). For the book-to-market ratio, there is significant evidence that the higher book-to-market ratios are related to higher returns in U.S whereas the book-to-market ratios are not significantly related to return in Australian.
The active fund managers always earn short term excess returns, but they can not outperform a passive buy-and–hold (BHM) investment strategy for US equity mutual funds with wavy returns in the future. In Australian market, the active fund managers are now less capable of outperforming BHM investment because the performance has been less significant for the last decade and there are several biases that limits in assessing whether the active managers can outperform the market.
As a result of the report, the markets
Market efficiency tests include weak, semi-strong and strong three forms. They assume that financial markets are "informationally efficient", or that prices of trading assets, already reflect all known information and therefore are unbiased in the sense that they reflect the collective beliefs of all investors about future prospects. The weak form test is based on the past information and public available information for semi-strong while strong form covers not only the public but also the private information.
Five market anomalies that appeared in U.S. and Australian equity market are discussed. They are Book-to-market ratio, January effect, small firm effect, weekend and temperature effect. The small firm effect seems to be disappeared in the US market in recent years and existed in Australia until 1994. January effect is vanishing in both US and Australian market. There is a statistically significant negative correlation between stock returns and temperature is found in both U.S and Australian equity market and theory of stock returns and temperature turned out to be true. In contrast to US market, Australian stock markets appeared to exhibit a Tuesday effect rather than Monday effect (Weekend effect). For the book-to-market ratio, there is significant evidence that the higher book-to-market ratios are related to higher returns in U.S whereas the book-to-market ratios are not significantly related to return in Australian.
The active fund managers always earn short term excess returns, but they can not outperform a passive buy-and–hold (BHM) investment strategy for US equity mutual funds with wavy returns in the future. In Australian market, the active fund managers are now less capable of outperforming BHM investment because the performance has been less significant for the last decade and there are several biases that limits in assessing whether the active managers can outperform the market.
As a result of the report, the markets
Bibliography: An insider can be officers, key employees, directors, or holders of more than ten percent of the firm 's shares, Larry Harris, Trading & Exchanges, Oxford Press, Oxford, 2003. Chapter 29 "Insider Trading" p. 584 Jaffe, Jeffrey R Victor Niederhoffer and M. F. M. Osborne. "Market Making and Reversal on the Stock Exchange." Journal of the American Statistical Association, 61 (December, 1966), pp897-916. Seyhun, H. Nejat. “Insiders Profits, Cost of Trading, and Market Efficiency.” Journal of Financial Economics 16(June 1986) p210 Banz, R Kim, Moon K., Burnie, David A., “THE FIRM SIZE EFFECT AND THE ECONOMIC CYCLE” Journal of Financial Research, 02702592, Spring2002, Vol. 25, Issue 1 Z G. William Schwert, (2003) “Anomalies and market efficiency”, Handbook of the Economics of Finance, pp942-944 Elfakhani Imad A. Moosa, (2007) “The Vanishing January Effect”, International Research Journal of Finance and Economics, Issue 7 (2007), p93 Imad A Brown, Philip, Donald B. Keim, Allen W. Kleidon, and Terry A. Marsh, “Stock Return Seasonalities and The Tax-Loss Selling Hypothesis: Analysis of the Arguments and Australian Evidence,” Journal of Financial Economics, 12, no.1 (1983) Andrew C Ferson, Wayne E., Andrea Heuson, and Tie Su. "Weak-form and semi-strong-form stock return predictability revisited." Management Science 51.10 (Oct 2005) Seyed Mehdian and Mark J Eugene F Fama and Kenneth R. French, ‘Common risk factors in the returns on stocks and bonds’, Journal of Financial Economics 33, 1993, pp 3-56 Eugene F Sawicki, J., Halliwell, J. and Heaney, R. ‘Size and Book to Market Effects in Australian Share Markets: A Time Series Analysis’, Accounting Research Journal, 12:2, 1999, pp 122-137 Faff R