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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

個人理財規劃之最適化研究 / The research of optimal individual financial planning

王琦樺, Wang,Chi-Hua Unknown Date (has links)
隨著國民所得水準及個人知識水準的提升,再加上人口結構的高齡化,國人財富管理的需求逐漸浮現,而如何依據個人的財務狀況,建構一套穩健成長的個人理財規劃,以實現家庭資產的經濟效益最大化,就成為當前財富管理市場面臨的重大議題。 然而,台灣的財富管理市場才剛萌芽,故綜觀現有文獻及實務上之論述,有關記載個人理財規劃服務的相關報導實為有限,且多屬片段,缺乏完整性之服務模式及可支援計算的理財軟體,因此,本研究之目的即針對個人理之需求建構一套理財服務模式及軟體,並透過此服務模式及軟體的實地操作,為投資人建立一套最適化的個人理財規劃。 本研究首先根據相關文獻,對個人理財規劃的理論架構進行完整的介紹,其次討論台灣目前財富管理事業的現況,接著以個人理財規劃的理論為基礎,建構一套理財規劃服務模式及軟體,驗證所提出的架構、流程、模式與方法的可行性與績效。最後,可以藉由本文研究,提供金融機構之財富管理部門在建置理財規劃服務模式及相關理財系統開發作為一個參考依據。
22

Investerares riskexponering i hållbara investeringar : En studie av asymmetrisk risk och hur den påverkas av positivt urval och dynamisk SRI / Investors risk exposure for sustainable investments : A study of asymmetrical risk and how it is affected by positive screening and dynamic SRI

Jonsson, Kim, Larsson, Jacob January 2018 (has links)
Titel: Investerares riskexponering i hållbara investeringar - En studie av asymmetrisk risk och hur den påverkas av positivt urval och dynamisk SRI Nivå: Examensarbete på kandidatnivå i företagsekonomi Författare: Kim Jonsson & Jacob Larsson Handledare: Peter Lindberg Datum: Maj, 2018 Syfte: “Undersöka huruvida en portföljs negativa asymmetriska risk, ur ett investerarperspektiv påverkas av positivt urval utifrån dynamisk SRI, baserad på ESG-faktorer”.  Metod: Konstruktion av en hypotetisk portfölj bestående av aktier, utifrån dynamisk SRI och positivt urval. Med finansiell backtracking mäts hur portföljen presterat avseende asymmetriskt betavärde förutsatt att den varit implementerade under en historisk tidsperiod. Portföljen reallokeras efter förutbestämda kriterier vid ingången av varje år under den historiska tidsperioden. Resultat: Den konstruerade portföljen uppvisar konsekvent lägre betavärde än marknaden, både traditionellt och asymmetriskt. Det asymmetriska betavärdet är, för den tidsperiod som inkluderar finanskrisen 2008, högre vid utfall under medelvärdet för att sedan avta vid negativa utfall. Då studien justeras för finanskrisen förändras resultatet till att visa successivt avtagande betavärden för utfall under medelvärdet och vidare, negativa utfall. Slutsats: Studiens resultat indikerar att urvalskriterier baserade på ESG-faktorer och positiv urvalsmetod, under vissa premisser har påverkan på portföljens asymmetriska riskexponering. Denna slutsats tyder också på att företag genom aktivt hållbarhetsarbete har möjlighet att minska sin kapitalkostnad, då investerares avkastningskrav på företaget sjunker. Forskningsbidrag: Utvecklad insikt i praktisk tillämpning av asymmetrisk riskanalys och avseende att en portfölj med begränsat antal tillgångar kan prestera lägre systematisk riskexponering än marknaden. Samt att urvalsmetod och urvalskriterier kan påverka asymmetrisk riskexponering. Vidare forskning: Framförallt avseende om någon av hållbarhetsfaktorerna har större betydelse för den asymmetriska systematiska riskexponeringen än övriga. Ytterligare forskning inom AMH och dess paradigm är också nödvändigt då random walk är ifrågasatt. Nyckelord: Asymmetrisk risk, hållbarhet, ESG, betavärde, dynamisk SRI, positivt urval, urvalskriterier, portföljallokering och RobecoSAM. / Title: Investors risk exposure for sustainable investments – A study of asymmetrical risk and how it is affected by positive screening and dynamic SRI Level: Bachelor thesis in Business Administration Author: Kim Jonsson & Jacob Larsson Supervisor: Peter Lindberg Date: May, 2018 Aim: “Investigate whether a portfolios negative asymmetric risk, from an investors perspective, is influenced by positive screening based on dynamic SRI, based on ESG-factors”. Method: Construction of a hypothetical portfolio consisting of stocks, based on dynamic SRI and positive screening. Financial backtracking measures how the portfolio performed regarding asymmetric beta values, provided it was implemented during a historical period of time. The portfolio is reallocated according to predefined criteria in the beginning of each year during the historical period. Results: The constructed portfolio consistently demonstrates lower beta values than the market, both traditionally and asymmetrically. The asymmetric beta value, is for the period of time including the 2008 financial crisis, higher than traditional beta value at outcomes below the mean value, then decreases in negative outcomes. As the study is adjusted for the financial crisis, the result changes to show gradually decreasing beta values ​​for outcomes below average and further negative outcomes. Conclusions: The study results indicate that selection criteria based on ESG factors and positive selection screening, under certain conditions, affect the asymmetric risk exposure of the portfolio. This conclusion also indicates that companies through active sustainability awareness have the opportunity to reduce their cost of capital, as investors' required rate of return declines. Contribution of the thesis: Practical insight regarding asymmetric risk analysis, and the fact that a portfolio composed of a limited amount of assets potentially demonstrates lower systematic risk exposure than the market. Furthermore, selection methods and selection criteria can affect asymmetric risk exposure. Suggestion for future research: If any of the sustainability factors are of greater significance regarding the asymmetric risk exposure. Further research within AMH and its paradigms is also necessary as random walk is questioned. Key words: Asymmetric risk, sustainability, ESG, beta value, dynamic SRI, positive screening, selection criteria, portfolio allocation and RobecoSAM
23

Robust Portfolio Optimization with Correlation Penalties / Robust portföljoptimering med korrelationsstraff

Nydahl, Pelle January 2023 (has links)
Robust portfolio optimization models attempt to address the standard optimization method's high sensitivity to noise in the parameter estimates, by taking an investor's uncertainty about the estimates into account when finding an optimal portfolio. In this thesis, we study robust variations of an extension of the mean-variance problem, where an additional term penalizing the portfolio's correlation with an exogenous return sequence is included in the objective. Using a normalized risk factor model of the asset returns, estimations are done using EMA filtering as well as exponentially weighted linear regression. We show that portfolio performance can significantly improve with respect to a range of metrics, such as Sharpe ratio, expected shortfall and skewness, when using appropriate robust models and hyperparameters. We further show that extending the optimization problem with a correlation penalty can notably reduce portfolio correlation with an arbitrary return sequence, with only a small impact on other performance metrics. / Robust portföljoptimering är en metod för att reducera vanliga portföljmodellers höga känslighet för brus i parameterskattningar, genom att ta en investerares osäkerhet kring skattningarna i åtanke när en optimal portfölj tas fram. I denna rapport studeras robusta varianter av ett utökat mean-variance-problem, där en straffterm för portföljens korrelation med en exogen avkastningsserie lagts till. Skattningarna bygger på en riskfaktor-modell för avkastningarna, och använder EMA-filter kombinerat med exponentiellt viktad linjär regression. Vi visar att en portföljs prestanda kan förbättras avsevärt med avseende på ett flertal prestandamått, till exempel Sharpe-kvot, expected shortfall och skevhet, vid användning av lämpliga robusta modeller och hyperparametrar. Vi visar också att inkludering av ett korrelationsstraff i optimeringsproblemet kan ge noterbara reduceringar i portföljens korrelation med en godtycklig avkastningsserie, med liten effekt på andra prestandamått.
24

Quantitative Methods of Statistical Arbitrage

Boming Ning (18414465) 22 April 2024 (has links)
<p dir="ltr">Statistical arbitrage is a prevalent trading strategy which takes advantage of mean reverse property of spreads constructed from pairs or portfolios of assets. Utilizing statistical models and algorithms, statistical arbitrage exploits and capitalizes on the pricing inefficiencies between securities or within asset portfolios. </p><p dir="ltr">In chapter 2, We propose a framework for constructing diversified portfolios with multiple pairs trading strategies. In our approach, several pairs of co-moving assets are traded simultaneously, and capital is dynamically allocated among different pairs based on the statistical characteristics of the historical spreads. This allows us to further consider various portfolio designs and rebalancing strategies. Working with empirical data, our experiments suggest the significant benefits of diversification within our proposed framework.</p><p dir="ltr">In chapter 3, we explore an optimal timing strategy for the trading of price spreads exhibiting mean-reverting characteristics. A sequential optimal stopping framework is formulated to analyze the optimal timings for both entering and subsequently liquidating positions, all while considering the impact of transaction costs. Then we leverages a refined signature optimal stopping method to resolve this sequential optimal stopping problem, thereby unveiling the precise entry and exit timings that maximize gains. Our framework operates without any predefined assumptions regarding the dynamics of the underlying mean-reverting spreads, offering adaptability to diverse scenarios. Numerical results are provided to demonstrate its superior performance when comparing with conventional mean reversion trading rules.</p><p dir="ltr">In chapter 4, we introduce an innovative model-free and reinforcement learning based framework for statistical arbitrage. For the construction of mean reversion spreads, we establish an empirical reversion time metric and optimize asset coefficients by minimizing this empirical mean reversion time. In the trading phase, we employ a reinforcement learning framework to identify the optimal mean reversion strategy. Diverging from traditional mean reversion strategies that primarily focus on price deviations from a long-term mean, our methodology creatively constructs the state space to encapsulate the recent trends in price movements. Additionally, the reward function is carefully tailored to reflect the unique characteristics of mean reversion trading.</p>
25

Stratégies alternatives de couverture de l'inflation en ALM / Alternative inflation hedging strategies for ALM

Fulli-Lemaire, Nicolas 24 January 2013 (has links)
La disparitions graduelle des peurs liées à l’inflation pendant l’ère de la «Grande Modération» macroéconomique est aujourd’hui chose révolue : la crise financière américaine des «Subprimes», la «Grande Récession» ainsi que la crise des dettes souveraines qui s’en est suivie ont abouti à un nouvel ordre économique caractérisé par une volatilité accrue de l’inflation, un accroissement des chocs dans les prix des matières premières et une défiance envers la qualité de la signature de certains émetteurs souverains pour n’en mentionner que trois caractéristiques. De la réduction des émissions de titres souverains indexés sur l’inflation aux taux réels négatifs jusqu’à de très longues maturités, cette nouvelle donne tend à mettre en péril aussi bien les stratégies conventionnelles de couvertures inflation que les stratégies directionnelles purement nominales . Cette thèse a pour but d’investiguer les effets de ces évènements qui ont changé la donne macro-financière et d’évaluer leurs conséquences en terme de couverture inflation aussi bien dans la gestion actif-passif des investisseurs institutionnels que sur l’épargne des particuliers. Trois stratégies alternatives de couverture sont proposées pour y faire face. / Gone are the days when inflation fears had receded under years of “Great Moderation” in macroeconomics. The US subprime financial crisis, the ensuing “Great Recession” and the sovereign debt scares that spread throughout much of the industrialized world brought about a new order characterized by higher inflation volatility, severe commodity price shocks and uncertainty over sovereign bond creditworthiness to name just a few. All of which tend to put in jeopardy both conventional inflation protected strategies and nominal unhedged ones: from reduced issues of linkers to negative long-term real rates, they call into question the viability of current strategies. This paper investigates those game changing events and their asset liability management consequences for retail and institutional investors. Three alternative ways to achieve real value protection are proposed.

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