Hitherto the diffusion of Electronic Data Interchange (EDI) has been limited due to high implementation and operational costs. On the other hand, the Extensible Markup Language (XML) has quickly become a generally accepted standard for integrating processing of formatted data - the literature is virtually unanimous that an integration of EDI into XML would make EDI more accessible and implementation faster and cheaper. The process of standardization of various EDI standard formats over XML is still underway and the question arises whether an early adoption of the technology would pay off. This thesis investigates the issue using real-options methodology. Starting from the well-known Black-Scholes model the parameters of the model are operationalized to decide about the best adoption timing: (i) project costs of implementation, (ii) value of savings of the project (substitutional, complementary, and strategic benefits), and (iii) project risk, expressed as the variance used in Black-Scholes. The latter considers both the external autonomy of the player in implementing new technology and internal properties in technology adoption. Discussing the technological properties of XML/EDI above parameters are operationalized step by step and integrated into a decision model to help each individual firm put the XML/EDI investment decision into real numbers. In order to better visualize the parameters of this decision framework, four company profiles, based on the theory of technology diffusion, will be introduced and mapped against the parameters of the Black-Scholes formula. (author's abstract)

本研究結果的重點如下：一、各樣本金融機構經由模型計算出的費率差異 頗大，顯示財務結構的不同，確實應課收不同保費。而現行的單一費率對 於好壞金融機構收取的費率一視同仁無法反應金融機構其經營風險的差異 ，也就無法避免低風險金融機構補貼高風險金融機構的弊病。因此應實施 差別費率較為合理。二、根據研究結果顯示，若以金融機構性質為分類， 其費率估計負擔由低至高依序為：一般民營銀行、國家行局、省市屬行庫 、民營中小企業銀行、信託投資公司、外商銀行、信用合作社、漁會信用 部、農會信用部。而此法的一大優點在於可對個別機構評估其相對風險性 的高低，即可依各自經營情況、組織結構分別評估其風險，以達精算上的 合理性。三、由各家樣本金融機構應負擔之估計存保費率可知，只要金融 機構資產結構稍有不同，便會使存保公司的負擔不同。換言之，因金融機 構體質的互異，其為存保公司所帶來的承保風險也有別，為避免資源配置 不當的缺失，實施以個別金融機構風險為基礎的差別費率是較公平、合理 的方式。四、承保比率亦是影響費率估計的一項因素，由實證可知承保比 率對費率估計有顯著的影響。即承保比率高的金融機構，其估計費率與全 部承保時的差異較小；承保比率低者，其估計費率與全部承保時的差異較 大。

本研究係利用財務理論定價模型之實質選擇權擴張情境模式，以三項式選擇權評價方法，評估現行上市的不動產投資信託商品（REITs）的合理價值。並選定富邦一號與二號、國泰一號與二號、新光一號等5檔REITs商品進行評價分析。 　　經研究結果，其中有4檔REITs評價價值與其2010年財報淨值非常接近；此外，並有其中3檔REITs的評價價值，相對於財報的每股淨值，更為接近實際股票市場交易的最高價格，證明本研究的三項式選擇權評價模型可適用於REITs商品的評價方法。 / This paper employs the Trinomial Real Option Pricing Model for the valuation of Real Estate Investment Trusts (REITs). The following five REITs in Taiwan (or T-REITs) are selected for empirical analysis: Fubon No.1 and No.2 REITs, Cathay No.1 and No.2 REITs, and Shin Kong No.1 REITs. Results show that the values of four T-REITs values from the valuation model are very close to their book value in the end of 2010, and three T-REITs values are also similar to their highest prices in the exchange market. Conclusions of this study imply that the Trinomial Real Option Pricing Model may serve as a good approach for the valuation of REITs prices.

>Magister Scientiae - MSc / Warrant pricing has become very crucial in the present market scenario. See, for example, M. Hanke and K. Potzelberger, Consistent pricing of warrants and traded options, Review Financial Economics 11(1) (2002) 63-77 where the authors indicate that warrants issuance affects the stock price process of the issuing company. This change in the stock price process leads to subsequent changes in the prices of options written on the issuing company's stocks. Another notable work is W.G. Zhang, W.L. Xiao and C.X. He, Equity warrant pricing model under Fractional Brownian motion and an empirical study, Expert System with Applications 36(2) (2009) 3056-3065 where the authors construct equity warrants pricing model under Fractional Brownian motion and deduce the European options pricing formula with a simple method. We study this paper in details in this mini-thesis. We also study some of the mathematical models on warrant pricing using the Black-Scholes framework. The relationship between the price of the warrants and the price of the call accounts for the dilution effect is also studied mathematically. Finally we do some numerical simulations to derive the value of warrants.

Magister Scientiae - MSc / We investigate some simulation-based approaches for the valuing of the employee stock options. The mathematical models that deal with valuation of such options include the work of Jennergren and Naeslund [L.P Jennergren and B. Naeslund, A comment on valuation of executive stock options and the FASB proposal, Accounting Review 68 (1993) 179-183]. They used the Black and Scholes [F. Black and M. Scholes, The pricing of options and corporate liabilities, Journal of Political Economy 81(1973) 637-659] and extended partial differential equation for an option that includes the early exercise. Some other major relevant works to this mini thesis are Hemmer et al. [T Hemmer, S. Matsunaga and T Shevlin, The influence of risk diversification on the early exercise of employee stock options by executive officers, Journal of Accounting and Economics 21(1) (1996) 45-68] and Baril et al. [C. Baril, L. Betancourt, J. Briggs, Valuing employee stock options under SFAS 123 R using the Black-Scholes-Merton and lattice model approaches, Journal of Accounting Education 25 (1-2) (2007) 88-101]. The underlying assets are studied under the GARCH (generalized autoregressive conditional heteroskedasticity) effects. Particular emphasis is made on the American style employee stock options. / South Africa

我國公部門出租不動產時，其租賃契約中之終止條件及續約條件等約定，與私部門間租賃契約頗有落差。而依據不動產估價技術規則第129 條規定：「不動產之租金估計應考慮契約內容、租期長短、使用目的、稅費負擔、租金水準、變遷狀態、租約更新、變更條件及其他相關因素估計之。」表示在訂定租金時需將契約內容及可能影響因素納入考量才符合公帄原則，然公部門租賃契約中之租金訂定是否將此等特殊條件納入考量，仍有待驗證。此部分在過去文獻中較少著墨，有鑑於此，本研究欲探討租賃契約中特殊條件(如單方面停止契約之權利)對租金之影響。 本研究先以特徵價格理論為基礎，建構複迴歸模型探討影響租金之因素，發現賦予出租方可逕為終止契約之權利，對商用不動產租金具有顯著影響；再進一步以二項式評價模式分析因終止契約條件不同，在租賃契約中隱含的實質選擇權價值變化，模擬結果發現租金成長率愈高，選擇權價值愈高；無風險利率愈高，選擇權價值愈低。研究結果符合選擇權理論，除了指出目前公部門資產租賃契約宜考量具特殊條件時租金之公帄性外，亦可提供爾後租約中含特殊條件時之租金定價參考。 / Rent is affected by various factors, including macro-economic, regional, individual and other related factors such as termination or renewal options. Public sectors in Taiwan prefer using template leasing contract for standardization concerns. The template leasing contract includes some terms favorable to lessors, such as termination option for lessors. The study focuses on the term to terminate the contract for lessors, which is especially considered imposing operation risk on tenants. This study at first employed the multi-regression model to examine factors affecting the rent level. Results show that the rent is significantly affected by the termination term for lessors besides other individual, regional and macro-economic variables. We further applied the binomial option pricing model to simulate how the value of leasing contract is affected by the termination options. Results show that the more the rent tends to grow, the higher value the termination term is; and the higher the interest rate, the lower value the termination term is. Results of this study provide precious implications for rent pricing as the contracts are embedded with the termination option.

Hedge funds use a variety of different financial instruments in order to try to achieve over-average returns without taking on excessive risk - options being one of the most common of these instruments. Basket options is a type of option that is written on several underlying assets that can be used to hedge risky positions. This project has been working together with the hedge fund Proxy P to develop software to construct basket options and to analyze their use as a hedging strategy. Construction of basket options can be performed through the use of several different mathematical models. These models range from complex continuous models, such as Monte Carlo simulations, to simple discrete models, such as the binomial option pricing model. In this project, the binomial option pricing model was chosen as the main tool to determine some quantities of basket options. It can conveniently handle both European and American options, independently of whether these are put or call options. The quantities calculated, the option price and option Delta, are dependent on the volatility and the initial price of the underlying. When evaluating the basket option there are two key assumptions that need to be studied. These key assumptions are if the weights and the initial price of the underlying change with each time step, or if they are held constant. It was found that both the weights and the price of the underlying should change dynamically with each time step. Furthermore, in order to evaluate the performance of the basket options used as a hedge, the project used historical data and measured how the options neutralized negative movements in the underlying. This was done through the use of the option Delta and the hedge ratio. What could be concluded was that the put basket option can serve as a relatively inexpensive hedge and minimize the risk on the downside in a sufficient matter. / Hedgefonder använder en rad olika finansiella instrument, där optioner är ett av de mest förekommande av dessa, för att generera överavkastning utan att ta överdriven risk. Korgoptioner, eller basket options som de kallas på engelska, är en typ av option som är skriven på flertalet underliggande tillgångar som kan användas för att gardera finansiella institutioner mot risk. Det här projektet har samarbetat med den svenska hedgefonden Proxy P för att utveckla programvara för att konstruera korgoptioner och evaluera hur de kan användas som hedgingstrategi. Konstrueringen av dessa korgoptioner kan göras med hjälp av flertalet matematiska mo-deller. Allt ifrån komplexa kontinuerliga modeller, som Monte Carlo simulering, till mer simpla diskreta modeller, som binomialprissättningsmodellen, kan användas. I detta projekt kommer binomialprissättningsmodellen användas för att beräkna relevanta kvantiteter gällande korgoptioner. Modellen kan hantera både optioner av den amerikanska och euro-peiska varianten, samt sälj- och köpoptioner. Relevanta kvantiteterna som benämnts gäller optionspriset samt optionens Delta, där dessa beror på marknadsvolatiliteten och startpriset på den underliggande tillgången. Vid utvärdering av korgoptionen behöver två antaganden tas i beaktande: att vikterna och initiala priset på underliggande ändras vid varje tidssteg eller om de hålls konstanta. Slutsatsen kunde dras att både vikterna och den underliggande tillgångens pris skulle vara dynamiska och därmed ändras vid varje tidssteg. För att kunna utvärdera hur väl korgoptioner fungerade som en hedge använde projektet historisk data för att utvärdera hur optionen neutraliserade negativa rörelser i den under-liggande tillgången. Denna utvärdering gjordes med avseende på Deltat hos optionen och hedgekvoten. Slutsatsen som kunde dras var att korgoptioner är ett relativt billigt sätt att hedga och minimera nedsidans risk.

The study investigates whether the main capital market theories and pricing models provide a reasonably accurate description of the working and efficiency of capital markets, of the pricing of shares and options and the effect the risk/return relationship has on investor behaviour. The capital market theories and pricing models included in the study are Portfolio Theory, the Efficient Market Hypothesis (EMH), the Capital Asset Pricing Model (CAPM), the Arbitrage Pricing Theory (APT), Options Theory and the BlackScholes (8-S) Option Pricing Model. The main conclusion of the study is that the main capital market theories and pricing models, as reviewed in the study, do provide a reasonably accurate description of reality, but a number of anomalies and controversial issues still need to be resolved. The main recommendation of the study is that research into these theories and models should continue unabated, while the specific recommendations in a South African context are the following: ( 1) the benefits of global diversification for South African investors should continue to be investigated; (2) the level and degree of efficiency of the JSE Securities Exchange SA (JSE) should continue to be monitored, and it should be established whether alternative theories to the EMH provide complementary or better descriptions of the efficiency of the South African market; (3) both the CAPM and the APT should continue to be tested, both individually and jointly, in order to better understand the pricing mechanism of, and risk/return relationship on the JSE; (4) much South African research still needs to be conducted on the efficiency of the relatively new options market and the application of the B-S Option Pricing Model under South African conditions. / Financial Accounting / M. Com. (Accounting)

論文名稱：公司信用風險之衡量 校所組別：國立政治大學金融研究所 畢業時間：九十年度第二學期 提要別：碩士學位論文提要 研究生：林妙宜 指導教授：陳松男博士 論文提要及內容： 信用風險一直是整體金融環境非常重要的一環，銀行授信、商業交易、投資評估，都會對信用風險做仔細的研究與評估。本論文以台灣的公司為樣本，採用會計財務比率與股票價格，主要兩項反映公司體質的資訊，建構信用風險模型，期望能提供台灣公司信用風險衡量上，公正而有效的指標。 以財務比率為基礎的區別分析模型，選取變數為獲利能力指標的常續性EPS、現金流量指標的現金流量對負債、成長率指標的盈餘成長率、償債能力指標的負債比率，與經營能力指標的平均收帳天數，這五項財務比率涵蓋企業繼續經營與財務狀況的各個層面。區別分析模型在財務危機前一年可達正確分類率91．67%。 以股票市場價格為基礎的選擇權模型，可由每日之股票價格求算出預期違約機率，將市場對公司價值的衡量轉化為信用風險的程度，能即時掌握公司體質的變化，做出適當之因應。 關鍵字：信用風險、財務危機、會計資訊、財務比率、區別分析、股票價格、選擇權模型、預期違約機率 / Title of Thesis: Corporate Credit Risk Measurement Name of Institute: Graduate Institute of Money and Banking, NCCU Graduate Date: June, 2002 Name of Student: Lin, Miao-Yi Advisor: Dr. Chen, Son-Nan Abstract: Credit Risk has been the great concern in the financial market. Before the bank grants a loan or the company makes deals and investment, they first consider the credit risk of the conterparty. The empirical study tries to construct the credit risk models based on the public firms in Taiwan. Using financial ratios and stock prices, the two main sources of corporate financial information, we expect to provide a fair and efficient indicator to measure the corporate credit risk in Taiwan. In the discriminant analysis based on accounting data, the model chooses five financial ratios that cover the corporate operation and financial situation. They are earnings per share, operating cash flow to total debt, equity substantial growth rate, and average days to accounts receivable. The discrimanant analysis model can accurately classify 91.67% of the data as being default or solvency one year before the financial distress. In the option pricing model based on stock prices, the expected default probability can be solved by daily stock prices. In this model, how the market values the firm is turned into the level of credit risk, which can help us catch the changes of corporate soundness and make proper responses. Keywords: Credit Risk, Financial Distress, Accounting Data, Financial Ratio, Discrimanant Analysis, Stock Prices, Option Pricing Model, Expected Default Probability

<p>We investigate some simulation-based approaches for the valuing of the employee stock options. The mathematical models that deal with valuation of such options include the work of Jennergren and Naeslund [L.P Jennergren and B. Naeslund, A comment on valuation of executive stock options and the FASB proposal, Accounting Review 68 (1993) 179-183]. They used the Black and Scholes [F. Black and M. Scholes, The pricing of options and corporate liabilities, Journal of Political Economy 81(1973) 637-659] and extended partial differential equation for an option that includes the early exercise. Some other major relevant works to this mini thesis are Hemmer et al. [T Hemmer, S. Matsunaga and T Shevlin, The influence of risk diversification on the early exercise of employee stock options by executive officers, Journal of Accounting and Economics 21(1) (1996) 45-68] and Baril et al. [C. Baril, L. Betancourt, J. Briggs, Valuing employee stock options under SFAS 123 R using the Black-Scholes-Merton and lattice model approaches, Journal of Accounting Education 25 (1-2) (2007) 88-101]. The underlying assets are studied under the GARCH (generalized autoregressive conditional heteroskedasticity) effects. Particular emphasis is made on the American style employee stock options.</p>