The Financialization of Food: An Inquiry into the 2008-2011 Food Price Spikes

This dissertation investigates the question: has financial speculation contributed to global food price volatility since the mid 2000s? I problematize the mainstream academic literature on the 2008-2011 food price spikes as being dominated by neoclassical economic perspectives and offer new conceptual and empirical insights into the relationship between financial speculation and food. Presented in three journal style manuscripts, manuscript one uses circuits of capital to conceptualize the link between financial speculators in the global north and populations in the global south. Manuscript two argues that what makes commodity index speculation (aka ‘index funds’ or index swaps) novel is that it provides institutional investors with what Clapp (2014) calls “financial distance” from the biopolitical implications of food speculation. Finally, manuscript three combines Gramsci’s concepts of hegemony and ‘the intellectual’ with the concept of performativity to investigate the ideological role that public intellectuals and the rhetorical actor the market play in the proliferation and governance of commodity index speculation. The first two manuscripts take an empirically mixed method approach by combining regression analysis with discourse analysis, while the third relies on interview data and discourse analysis. The findings show that financial speculation by index swap dealers and hedge funds did indeed significantly contribute to the price volatility of food commodities between June 2006 and December 2014. The results from the interview data affirm these findings. The discourse analysis of the interview data shows that public intellectuals and rhetorical characters such as ‘the market’ play powerful roles in shaping how food speculation is promoted, regulated and normalized. The significance of the findings is three-fold. First, the empirical findings show that a link does exist between financial speculation and food price volatility. Second, the findings indicate that the post-2008 CFTC and the Dodd-Frank reforms are unlikely to reduce financial speculation or the price volatility that it causes. Third, the findings suggest that institutional investors (such as pension funds) should think critically about how they use commodity index speculation as a way of generating financial earnings.

FX modelling under collateralization

We present the market practice for interest rate yield curves construction and pricing interest rate derivatives. Then we give a brief description of the Vasicek and the Hull-White models, with an example of calibration to market data. We generalize the classical Black-Scholes-Merton pricing formulas, considering more general cases such as perfect or partial collateral, derivatives on a dividend paying asset subject to repo funding, and multiple currencies. Finally we derive generic pricing formulae for different combinations of cash flow and collateral currencies, and we apply the results to the pricing of FX swaps and CCS, and we discuss curve bootstrapping.

Analyse comparée de l'efficacité des programmes de conversion de titres de dette en prise de participation en Argentine, au Chili et au Mexique comme solution partielle à leur niveau d'endettement critique

Cet ouvrage comporte d'abords une mise en situation décrivant le contexte économique qui mena à la crise du début des années 1980 et à la mise sur pieds de nouveaux mécanismes financiers visant le ré-équilibre des économies en difficulté. Parmi l'ensemble des nouveaux types de transactions, les conversions de titres de dette en prise de participation (Debt for Equity Swaps: DES) sont étudiées en particulier à cause des nombreux avantages qu'elles comportent. Dans un contexte de déséquilibres interne et externe graves tel ceux vécus par certains pays d'Amérique latine, ces conversions semblent en effet très appropriées grâce à leur contribution à réduire l'encours de la dette extérieure et à augmenter le niveau des investissements, tout en limitant les pertes des banques prêteuses. L'analyse des programmes DES de l'Argentine, du Chili et du Mexique est faite à trois niveaux: le comportement des principaux indicateurs économiques est observé avant et après la mise en application des programmes, les avantages que les investisseurs et les pays débiteurs ont pu tirer des transactions sont ensuite mesurés en termes monétaires, et finalement, une étude des clauses particulières à chaque programme permet de terminer l'étude de l'efficacité des démarches de chaque pays pour retrouver un certain équilibre économique. Chacun des trois pays étudiés a démontré une certaine force en particulier. L'Argentine est le pays qui a le mieux profité de la décote de sa dette sur le marché secondaire et ainsi réussit à réduire son encours avec des escomptes considérables. Le volume des transactions fut cependant minime. C'est le Chili qui a pu radier la plus forte proportion de sa dette totale grâce aux transactions DES. Finalement, le Mexique s'est démarqué par l'importance des avantages qu'il a offerts aux investisseurs lors de la conversion des titres. L'étude permet de conclure que les transactions DES ont en effet un potentiel très intéressant comme outil de redressement pour un pays ne pouvant plus assumer le niveau de sa dette, mais ce, à condition que la mise sur pieds des programmes coïncide avec une prise en charge globale des économies. Le succès d'un programme dépend en grande partie de la confiance des investisseurs internationaux et des banques en la volonté de chaque état à adopter les mesures d'ajustement qu'impose leur situation critique.

Planeamento Fiscal nas operações relativas a instrumentos financeiros derivados e a sua tributação

Mestrado em Fiscalidade

Three Essays in Empirical Asset Pricing

The financial crisis of 2007-2008 led to extraordinary government intervention in firms and markets. The scope and depth of government action rivaled that of the Great Depression. Many traded markets experienced dramatic declines in liquidity leading to the existence of conditions normally assumed to be promptly removed via the actions of profit seeking arbitrageurs. These extreme events motivate the three essays in this work. The first essay seeks and fails to find evidence of investor behavior consistent with the broad 'Too Big To Fail' policies enacted during the crisis by government agents. Only in limited circumstances, where government guarantees such as deposit insurance or U.S. Treasury lending lines already existed, did investors impart a premium to the debt security prices of firms under stress. The second essay introduces the Inflation Indexed Swap Basis (IIS Basis) in examining the large differences between cash and derivative markets based upon future U.S. inflation as measured by the Consumer Price Index (CPI). It reports the consistent positive value of this measure as well as the very large positive values it reached in the fourth quarter of 2008 after Lehman Brothers went bankrupt. It concludes that the IIS Basis continues to exist due to limitations in market liquidity and hedging alternatives. The third essay explores the methodology of performing debt based event studies utilizing credit default swaps (CDS). It provides practical implementation advice to researchers to address limited source data and/or small target firm sample size.

Las cláusulas abusivas en la contratación bancaria

En la presente tesis doctoral se agrupan las contribuciones doctrinales del doctorando relacionadas con las cláusulas abusivas en la contratación financiera, en general, y bancaria, en particular. Cada uno de los apartados cuyo contenido se muestra, someramente, a continuación, se fundamenta en los diversos trabajos publicados en los últimos años. Tras la introducción y una serie de consideraciones generales, se trata, en primer lugar, sobre la transformación del sistema financiero mundial y europeo, así como del español. En cuanto a este último, su transformación ha corrido pareja con la de las cajas de ahorros, por lo que se exponen los principales hitos del proceso que ha conducido, a pesar de su reconocimiento legal, a su práctica desaparición. En el apartado posterior, una vez planteado el contexto institucional, se presentan las particularidades que concurren en la contratación financiera y bancaria, en la que se combinan normas de derecho privado y de derecho público, lo que puede suscitar dudas acerca del verdadero alcance protector de algunas normas administrativas (especialmente, por ejemplo, de la conocida como MiFID). A continuación, se presentan algunas de las controversias más extendidas en los años recientes, en un escenario de crisis financiera y económica sin precedentes. Se trata, de este modo, sobre el asesoramiento en materia de inversión, relacionado, por ejemplo, con la comercialización de participaciones preferentes. Una de las formas de resolver la situación de iliquidez de muchos clientes ha sido por medio del canje de preferentes por otros productos financieros. En los peores casos, esto es, en el de las entidades financieras que han recibido apoyo público, el canje no ha sido posible y los preferentistas han sufrido cuantiosas pérdidas tras la práctica de quitas. Con el arbitraje de preferentes se ha procurado dar una solución rápida, por una vía alternativa a la judicial, a los casos en los que, casi a simple vista, se ha podido apreciar la existencia de mala praxis por parte de las entidades financieras. Otra de las manifestaciones de la crisis ha sido la profunda revisión del marco hipotecario español, sobre todo por la enérgica protección dispensada al consumidor por el Tribunal de Justicia de la Unión Europea. Las manifestaciones en el mercado hipotecario español han sido múltiples, como se expone en esta tesis (oferta de swaps para convertir, de hecho, el tipo de interés variable en fijo; suspensión de ejecuciones hipotecarias y lanzamientos judiciales; el debate sobre la dación en pago; etcétera). Pero, sobre todo, la que acaso sea la mayor polémica, en una discusión no cerrada, sea la de las cláusulas suelo en lo préstamos hipotecarios a tipo variable, que impiden al prestatario beneficiarse plenamente de la bajada del Euríbor a 12 meses, que es el índice de referencia más extendido, y que de rondar el 5,4% en 2008 está a finales de 2015 cerca del 0% (en torno al 0,15%). El estudio de fondo de la tesis concluye con un análisis de las acciones colectivas, que, a pesar de los desarrollos normativos de años recientes siguen presentando algunos inconvenientes técnicos y prácticos, y la tendencia a que el sistema financiero se transforme no solo en el fondo y la forma, sino también en cuanto al modo de tratar con el cliente, que ha perdido, en general, la confianza en el conjunto del sistema y de las diversas instituciones, en particular. A la vista de todo ello, la tesis finaliza con una serie de concretas conclusiones.

Heuristic approaches for multi-criteria optimisation in kidney exchange programs

The Kidney Exchange Problem (KEP) is an optimisation problem that was first discussed in Rapaport (1986) but has only more recently been the subject of much work by combinatorial optimisation re-searchers. This has been in parallel with its increased prevalence in the medical community. In the basic formulation of a KEP, each instance of the problem features a directed graph D = (V,A) . Each node i ∈ V represents an incompatible pair wherein the patient needs to trade kidneys with the patient of another incompatible pair. The goal is to find an optimal set of cycles such that as many patients as possible receive a transplant. The problem is further complicated by the imposition of a cycle-size constraint, usually considered to be 3 or 4. Kidney exchange programs around the world implement different algorithms to solve the allocation problem by matching up kidneys from potential donors to patients. In some systems all transplants are considered equally desirable, whereas in others, ranking criteria such as the age of the patient or distance they will need to travel are applied, hence the multi-criteria nature of the KEP. To address the multi-criteria aspect of the KEP, in this paper we propose a two-stage approach for the kidney exchange optimisation problem. In the first stage the goal is to find the optimal number of exchanges, and in the second stage the goal is to maximise the weighted sum of the kidney matches, subject to the added constraint that the number of exchanges must remain optimal. The idea can potentially be extended to multiple-objectives, by repeating the process in multiple runs. In our preliminary numerical experiments, we first find the maximum number of kidney matches by using an existing open source exact algorithm of Anderson et al. (2015). The solution will then be used as an initial solution for the stage two optimisation problem, wherein two heuristic methods, steepest ascent and random ascent, are implemented in obtaining good quality solutions to the objective of maximizing total weight of exchanges. The neighbourhood is obtained by two-swaps. It is our intention in the future to implement a varying neighbourhood scheme within the same two heuristic framework, or within other meta-heuristic framework.

Should credit default swap issuers be subject to prudential regulation?

Credit default swaps (CDSs) contributed significantly to and exacerbated the recent global financial crisis. As a result of the major role that CDSs played, this paper argues that CDS issuers should be subject to prudential regulation, in order to improve systemic stability in the financial system. Three reasons are put forward for this proposition. First, CDSs are functionally equivalent to insurance and so should be regulated in a consistent manner. Secondly, CDSs perform the economic function of assuming credit risk, and so should be prudentially regulated in the same way as other financial institutions which assume credit risk. Finally, CDSs have the potential to contribute to systemic instability in the financial system, and prudential regulation would reduce this risk.

Interrelated product design activities sequencing with efficient tabu search algorithms

This paper proposes and investigates a metaheuristic tabu search algorithm (TSA) that generates optimal or near optimal solutions sequences for the feedback length minimization problem (FLMP) associated to a design structure matrix (DSM). The FLMP is a non-linear combinatorial optimization problem, belonging to the NP-hard class, and therefore finding an exact optimal solution is very hard and time consuming, especially on medium and large problem instances. First, we introduce the subject and provide a review of the related literature and problem definitions. Using the tabu search method (TSM) paradigm, this paper presents a new tabu search algorithm that generates optimal or sub-optimal solutions for the feedback length minimization problem, using two different neighborhoods based on swaps of two activities and shifting an activity to a different position. Furthermore, this paper includes numerical results for analyzing the performance of the proposed TSA and for fixing the proper values of its parameters. Then we compare our results on benchmarked problems with those already published in the literature. We conclude that the proposed tabu search algorithm is very promising because it outperforms the existing methods, and because no other tabu search method for the FLMP is reported in the literature. The proposed tabu search algorithm applied to the process layer of the multidimensional design structure matrices proves to be a key optimization method for an optimal product development.

Interrelated product design activities sequencing with efficient tabu search algorithms

This paper proposes and investigates a metaheuristic tabu search algorithm (TSA) that generates optimal or near optimal solutions sequences for the feedback length minimization problem (FLMP) associated to a design structure matrix (DSM). The FLMP is a non-linear combinatorial optimization problem, belonging to the NP-hard class, and therefore finding an exact optimal solution is very hard and time consuming, especially on medium and large problem instances. First, we introduce the subject and provide a review of the related literature and problem definitions. Using the tabu search method (TSM) paradigm, this paper presents a new tabu search algorithm that generates optimal or sub-optimal solutions for the feedback length minimization problem, using two different neighborhoods based on swaps of two activities and shifting an activity to a different position. Furthermore, this paper includes numerical results for analyzing the performance of the proposed TSA and for fixing the proper values of its parameters. Then we compare our results on benchmarked problems with those already published in the literature. We conclude that the proposed tabu search algorithm is very promising because it outperforms the existing methods, and because no other tabu search method for the FLMP is reported in the literature. The proposed tabu search algorithm applied to the process layer of the multidimensional design structure matrices proves to be a key optimization method for an optimal product development.