Due to the characteristics of convertible bond, the issuing volumes are smaller than stocks and the investors are mostly institutional investors. Therefore, the turnover and the market liquidity of convertible bond are lower than those of stock market. The past literature indicate that the reaction of corporate bond to the fundamental information falls behind the stock, therefore, the price change of corporate bond always lag behind that of stock market. Moreover, the extra right of convertible bond compare to corporate bond is the convertible option in exchange for stocks, that also causes the relation between the stocks and the convertible is much closer than the normal corporate bond. The motivation of this study is to take advantage of the co-movement relation between these two markets to discover the profit opportunities of investment strategy. As a result, the purpose of this study is to investigate the prediction of the convertible bond and the reaction of the market information. Firstly, I try to verify momentum effect or overreaction effect in convertible bond is significant. Second, I apply the VAR model and Granger model to analyze the return relationship between convertible bonds and stocks, and to formulate our strategies by predicting the return of convertible bond from the lagged return of stocks. At the end, I analyze the performance of strategy in order to discover the best timing of buying convertible bonds for investors. Our empirical study exhibits there has no momentum effect in Taiwan convertible bonds market. Conversely, we discover the presence of overreaction effect but it is insignificant. Moreover, it¡¦s effective to predict the return of convertible bond by using the stocks return, otherwise it¡¦s not. Finally, the strategy of using the stock return in predicting the return of convertible bond can earn abnormal return without considering the transaction cost. On the contrary, the performance of using the return of convertible bond in predicting the stock return is insignificant. Our results demonstrate that we can refer to the past literature about ¡§the reaction of corporate bond to the fundamental information of companies falls behind the stock¡¨ to invest in convertible bond profitably. In conclusion, investors can follow our empirical framework and result to forecast the price trend of the convertible bond by referring the stock price.

This paper attempts to find the relationship between momentum and firm¡¦s credit rating. According to Avramov¡¦s (2007) finding, there is a strong link between momentum and firm credit rating in US. In this paper, the similar phenomenon is proven existing in Taiwan stock market. Momentum profitability is large among low-grade firms, but it is insignificant among high-grade firms. The source of momentum profits is from operating performance, financial performance, volatility and illiquidity. For loser (winner) stocks in the low rating category, profit margins, sales growth, operating cash flows, and interest coverage decrease (increase) over the formation and holding periods, while illiquidity and volatility increase (decrease). As the market observes the deteriorating (improving) conditions, there is a pressure to sell (buy) losers (winners), which enhances gains among high risk winners and losses among high risk losers.

Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references (leaves 97-101). Also available on the Internet.

Graduate

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Orbital angular momentum (OAM) is a property of light that is widely used for applications in bioimaging, optical communication and optical manipulation, but is mainly limited to the infrared and visible spectra. Developing a table-top source of Extreme Ultraviolet (XUV) light containing an arbitrary amount of OAM is yet to be achieved. We accomplish this by exploiting high-harmonic generation (HHG), a process whereby an infrared pump beam produces high order harmonics. We experimentally demonstrate the conservation of OAM in HHG by measuring harmonics of order n containing n times the OAM of the pump (n = 11, 13, 15 in our experiment). These results agree with our theoretical model. We also show theoretically how to manipulate the HHG process to impart an arbitrary amount of OAM to the di fferent harmonics. We hence show the way to a table-top and flexible source of XUV light containing orbital angular momentum.

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Past research documents a positive link between momentum and firm-level default risk, yet this anomaly is not connected to default risk at the macro level. Namely, there is no documented momentum during recessions, when default is higher on average. In the first essay, "Momentum and Aggregate Default Risk," we attempt to resolve this puzzle by analyzing momentum pro ts over time, conditional on both business cycles and unexpected changes in aggregate default risk. First, we show that momentum is driven by shocks to aggregate default, rather than general economic conditions such as expansions and recessions. Using the Fama and MacBeth procedure, we find that a conditional default shock factor is priced and can explain a large portion of the total momentum returns. Second, we provide a risk-based explanation for this anomaly by linking the returns of momentum portfolios to shareholder recovery during financial distress. We find that losers have higher recovery (i.e., shareholders have high bargaining power) on average, and, as a result, have relatively lower risk in high default states of the world. Therefore, loser stocks have a lower risk premium and lower expected returns in worsening aggregate default conditions, leading to the observed momentum. This effect is more pronounced among stocks of firms with low credit ratings. Our results help to reconcile the seemingly contradictory evidence documented by previous studies and o er a rational explanation for the momentum anomaly. In the second essay, "Sources of Momentum in Bonds," we study the relationship between momentum in bond returns and aggregate default. We document that momentum in corporate bonds occurs mainly during periods of high default shocks and is driven by losers. Supporting this result, we find that conditional default risk is priced in the cross-section of corporate bond portfolios. Motivated by these findings, we develop a theoretical model connecting bond momentum returns to the ability of bondholders to recover value in financial distress. Specifically, we find that losers have relatively higher recovery potential and, therefore, become less risky when high default shocks occur. Thus, losers have lower expected returns in high default shocks, leading to the observed conditional momentum. Further, US government bonds, with default risk approaching zero, feature no momentum, however this anomaly prevails in sovereign bonds with positive default risk, consistent with our main results.

Thesis (Ph. D.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 4, 2008) Vita. Includes bibliographical references.