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The largest investment banks in London each have thousands of servers largely devoted to Monte Carlo simulations, and to quantify their risks and satisfy regulatory demands they need to be able to calculate huge numbers of sensitivities (defined below) known collectively as "Greeks". An adjoint technique developed by Professor Mike Giles in 2006 greatly reduced the computational complexity of these calculations. The technique is used extensively by Credit Suisse and other major banks, reducing their computing costs and energy consumption. It has also led to the Numerical Algorithms Group developing new software to support the banks in exploiting this new adjoint approach to computing sensitivities.
Professor Paul Grout has had a significant impact on national policy on the delivery of public services by the private sector in the last five years. His research undertaken at the University of Bristol on private provision by regulated utility companies and public private partnerships, using both economic theory and empirical studies, paved the way for his central involvement in, and directly informed, key regulatory decisions. These decisions impact materially on almost every individual and organisation in the UK. His research also directly led to his appointment in 2012 to the Board of Ofgem (the Gas and Electricity Markets Authority), the UK energy regulator.
The demise of Lehman Brothers in 2008 marked the start of the current financial crisis and illustrated some of the adverse consequences of linkages between banks. The prospect of systemic crises has concerned bank regulators and monetary policy authorities for many years. Research by Professor Altunbaş at Bangor Business School, in close collaboration with the European Central Bank (ECB), has had substantial impact over 2008-2013 by influencing priorities in the international policy debate on how bank innovation can influence the conduct of monetary policy. It shows that the effectiveness of traditional monetary policy transmission mechanisms (such as the bank lending channel) is reduced by securitization activity and this also exacerbates the risk-taking channel of monetary policy. Evidence of the impact and overall scope of Professor Altunbaş' research is reflected in reference to his research at the highest monetary policy levels in Europe as well as widespread recognition in official central bank and international organization publications.
The global financial crisis led the European Union (EU) to diversify its sources for the EU Budget, including co-financing instruments with multilateral development banks. Dr Robinson's research addressed key concerns about financial risk and the lack of transparency created through such partnerships. His research has been recognised as improving the understanding of these complex instruments within EU institutions and its impact may be measured through the implementation of several of its key recommendations. These include the creation of the `EBRD Representative for EU affairs' within a participating bank, the acceleration of EU co-financing strategy, and the unprecedented action of the EU Court of Auditors including the banks in their auditing process.
A portfolio of research on the structure, conduct and performance of credit unions has led to the following impacts:
The risk of a systemic crisis and the inability of depositors to monitor how banks are governed are long-standing public policy concerns. Since joining Bangor University in 2008 Professor Klaus Schaeck and collaborators from central banks and international financial organisations have worked to inform the global policy debate on these issues. Specifically, how varying competitive conditions, corporate governance structures and regulatory innovations incentivise the development of safer and sounder banking systems. Notable impacts of Schaeck's research since 2008 include: the use by central banks of his new methodology to gauge banking sector competition; priority change in the policy debate over the structure of bank boards and, in particular, the influence of female executives; and finally heightened policy awareness of the unintended consequences of regulations imposed on troubled or bailed-out banks.
Prof. Pennanen and collaborators have developed mathematical models and computational techniques for financial risk management. The techniques allow for quantitative analysis and optimization of financial risk management actions in an uncertain investment environment. The techniques have been used by the State Pension Fund, Ministry of Social Affairs and Health, Bank of Finland and Pension Policy Institute. The techniques have significant impact on practitioners and professional services in increasing the awareness and understanding of long-term financial risks that are difficult to quantify with more traditional techniques. Beneficiaries of the developed risk management techniques include future pensioners and tax payers.
Research of Professor Brigo in the areas of credit risk, pricing models for the valuation of counterparty risk, and the development of accurate calibration methods of various credit risk models has generated significant impact both on public policy and on practitioners and professional services. His models were implemented and his calibration methods adopted in the financial industry. The significance attached to his work by the industry also resulted in a collaboration with the German regulator (BAFIN). Further evidence of his impact can be found in the fact that a Court of Law based its analysis in a financial intermediation case on Brigo's research.
The banking crisis that followed the collapse of Northern Rock in 2007 resulted in an urgent need to inject liquidity into the financial system. In order to resolve these issues, the Bank of England asked Professor Klemperer, an expert in auction theory, to help re-dseign its long-term market operations to allow the Bank of England to auction loans backed by financial collateral of varying quality. Since 2010, this has been adopted as the Bank of England's standard mechanism for its long-term repurchase operations. The potential impact of the new auction design extends beyond the Bank of England to other central banks, private industry and to industry regulators.
Research by Oxford econometricians provided the basis for innovative new methods for predicting periods of potential financial stress and providing protection for investors against extreme events. During periods of financial stress, equity funds tend to sharply lose value while volatility tends to increase. Adding some long volatility exposure to a standard equity portfolio can significantly improve the tail behaviour of a portfolio. However, it is expensive to continually hold volatility contracts due to the volatility risk premium. Researchers at Man Group have applied the Oxford research to create new strategies to protect against tail risk and these are incorporated in their Tail Protect fund launched in October 2009.