Abstract
Stock loans are business contracts between borrowers and lenders in which the borrower uses shares of stock as collateral for the loan. Since the value of the collateral is subject to wide and frequent price swings, valuing such a transaction behaves more like an option pricing problem than a debt valuation problem. This paper will list, prove, and analyze formulas for stock loan valuation with finite horizon under various stock models, including classical geometric Brownian motion, mean-reverting, and two-state regime-switching with both mean-reverting and geometric Brownian motion states. Numerical examples are reported to illustrate the results.
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References
J. Xia and X. Y. Zhou, Stock loans, Mathematical Finance, 2007, 17: 307–317.
Q. Zhang and X. Y. Zhou, Valuation of stock loans with regime switching, SIAM J. Contr. Optim., 2009, 48: 1229–1250.
J. D. Hamilton, A new approach to the economic analysis of non-stationary time series, Econometrica, 1989, 57: 357–384.
G. B. Di Masi, Y. M. Kabanov, and W. J. Runggaldier, Mean variance hedging of options on stocks with Markov volatility, Theory of Probability and Applications, 1994, 39: 173–181.
P. B. Bollen, Valuing options in regime-switching models, Journal of Derivatives, 1998, 6: 38–49.
J. Buffington and R. J. Elliott, American options with regime switching, International Journal of Theoretical and Applied Finance, 2002, 5: 497–514.
X. Guo, Inside Information and Stock Fluctuations, Ph.D. thesis, Rutgers University, 1999.
L. Shepp, A model for stock price fluctuations based on information, IEEE Transactions on Information Theory, 2002, 48: 1372–1378.
X. Guo, Inside Information and option pricings, Quantitative Finance, 2001, 1: 38–44.
X. Guo, An explicit solution to an optimal stopping problem with regime switching, J. App. Prob., 2001, 38: 464–481.
J. C. Duan, I. Popova, and P. Ritchken, Option pricing under regime switching, Quantitative Finance, 2002, 2: 116–132.
M. R. Hardy, A regime-switching model of long-term stock returns, North American Actuarial Journal, 2001, 5: 41–53.
X. Guo and Q. Zhang, Optimal selling rules in a regime switching model, IEEE Transactions on Automatic Control, 2005, 50: 1450–1455.
Q. Zhang, Stock trading: An optimal selling rule, SIAM J. Contr. Optim., 2001, 40: 64–87.
Q. Zhang and G. Yin, Nearly optimal asset allocation in hybrid stock-investment models, J. Optim. Theory Appl., 2004, 121: 419–444.
X. Y. Zhou and G. Yin, Markowitz’s mean-variance portfolio selection with regime switching: A continuous-time model, SIAM Journal on Control and Optimization, 2003, 42: 1466–1482.
A. Cowles and H. Jones, Some posteriori probabilities in stock market action, Econometrica, 1937, 5: 280–294.
E. Fama and K. R. French, Permanent and temporary components of stock prices, Journal of Political Economy, 1988, 96: 246–273.
L. A. Gallagher and M. P. Taylor, Permanent and temporary components of stock prices: Evidence from assessing macroeconomic shocks, Southern Economic Journal, 2002, 69: 345–362.
C. M. Hafner and H. Herwartz, Option pricing under linear autoregressive dynamics, heteroskedasticity, and conditional leptokurtosis, Journal of Empirical Finance, 2001, 8: 1–34.
C. Blanco and D. Soronow, Mean reverting processes — Energy price processes used for derivatives pricing and risk management, Commodities Now, 2001, 68–72.
C. de Jong and R. Huisman, Option formulas for mean-reverting power prices with spikes, preprint.
L. P. Bos, A. F. Ware, and B. S. Pavlov, On a semi-spectral method for pricing an option on a mean-reverting asset, Quantitative Finance, 2002, 2: 337–345.
H. Zhang and Q. Zhang, Trading a mean-reverting asset: Buy low and sell high, Automatica, 2008, 44: 1511–1518.
Q. S. Song, G. Yin, and Q. Zhang, Stochastic optimization methods for buying-low-and-selling-high strategies, Stochastic Analysis and Applications, 2009, 27: 523–542.
R. C. Merton, Theory of rational option pricing, Bell Journal of Economics and Management Science, 1973, 4: 141–183.
G. Yin, J. Yu, and Q. Zhang, A stochastic approximation algorithm for option pricing model calibration with a switchable market, International Journal of Computer Mathematics, in press.
A. Etheridge, A Course in Financial Calculus, Cambridge University Press, Cambridge, UK, 2002.
I. Karatzas and S. E. Shreve, Methods of Mathematical Finance, Springer, New York, 1998.
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Prager, D., Zhang, Q. Stock loan valuation under a regime-switching model with mean-reverting and finite maturity. J Syst Sci Complex 23, 572–583 (2010). https://doi.org/10.1007/s11424-010-0146-7
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DOI: https://doi.org/10.1007/s11424-010-0146-7