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Model Risk
In finance, model risk is the risk of loss resulting from using insufficiently accurate models to make decisions, originally and frequently in the context of valuing financial securities. However, model risk is more and more prevalent in activities other than financial securities valuation, such as assigning consumer credit scores, real-time probability prediction of fraudulent credit card transactions, and computing the probability of air flight passenger being a terrorist. Rebonato in 2002 defines model risk as "the risk of occurrence of a significant difference between the mark-to-model value of a complex and/or illiquid instrument, and the price at which the same instrument is revealed to have traded in the market". Types Burke regards failure to use a model (instead over-relying on expert judgment) as a type of model risk.http://www.siiglobal.org/SII/WEB5/sii_files/Membership/PIFs/Risk/Model%20Risk%2024%2011%2009%20Final.pdf Derman describes various types of model risk that ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finance
Finance is the study and discipline of money, currency and capital assets. It is related to, but not synonymous with economics, the study of production, distribution, and consumption of money, assets, goods and services (the discipline of financial economics bridges the two). Finance activities take place in financial systems at various scopes, thus the field can be roughly divided into personal, corporate, and public finance. In a financial system, assets are bought, sold, or traded as financial instruments, such as currencies, loans, bonds, shares, stocks, options, futures, etc. Assets can also be banked, invested, and insured to maximize value and minimize loss. In practice, risks are always present in any financial action and entities. A broad range of subfields within finance exist due to its wide scope. Asset, money, risk and investment management aim to maximize value and minimize volatility. Financial analysis is viability, stability, and profitability asse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collateralized Debt Obligation
A collateralized debt obligation (CDO) is a type of structured asset-backed security (ABS). Originally developed as instruments for the corporate debt markets, after 2002 CDOs became vehicles for refinancing mortgage-backed securities (MBS).Lepke, Lins and Pi card, ''Mortgage-Backed Securities'', §5:15 (Thomson West, 2014). Like other private label securities backed by assets, a CDO can be thought of as a promise to pay investors in a prescribed sequence, based on the cash flow the CDO collects from the pool of bonds or other assets it owns. Distinctively, CDO credit risk is typically assessed based on a probability of default (PD) derived from ratings on those bonds or assets. The CDO is "sliced" into sections known as "tranches", which "catch" the cash flow of interest and principal payments in sequence based on seniority. If some loans default and the cash collected by the CDO is insufficient to pay all of its investors, those in the lowest, most "junior" tranches suffer loss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Value At Risk
Value at risk (VaR) is a measure of the risk of loss for investments. It estimates how much a set of investments might lose (with a given probability), given normal market conditions, in a set time period such as a day. VaR is typically used by firms and regulators in the financial industry to gauge the amount of assets needed to cover possible losses. For a given portfolio, time horizon, and probability ''p'', the ''p'' VaR can be defined informally as the maximum possible loss during that time after excluding all worse outcomes whose combined probability is at most ''p''. This assumes mark-to-market pricing, and no trading in the portfolio. For example, if a portfolio of stocks has a one-day 95% VaR of $1 million, that means that there is a 0.05 probability that the portfolio will fall in value by more than $1 million over a one-day period if there is no trading. Informally, a loss of $1 million or more on this portfolio is expected on 1 day out of 20 days (because of 5% proba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Statistical Model Specification
In statistics, model specification is part of the process of building a statistical model: specification consists of selecting an appropriate functional form for the model and choosing which variables to include. For example, given personal income y together with years of schooling s and on-the-job experience x, we might specify a functional relationship y = f(s,x) as follows: : \ln y = \ln y_0 + \rho s + \beta_1 x + \beta_2 x^2 + \varepsilon where \varepsilon is the unexplained error term that is supposed to comprise independent and identically distributed Gaussian variables. The statistician Sir David Cox has said, "How hetranslation from subject-matter problem to statistical model is done is often the most critical part of an analysis". Specification error and bias Specification error occurs when the functional form or the choice of independent variables poorly represent relevant aspects of the true data-generating process. In particular, bias (the expected value of the di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David X
David X ( ka, დავით X) (1482–1526) was a king of the Georgian kingdom of Kartli from 1505 to 1525. Life David was the eldest son of Constantine II, whom he succeeded as king of Kartli in 1505. Although Constantine had recognised the independence of the breakaway Georgian kingdoms of Imereti and Kakheti, the rivalry among these polities continued under David. He had to defend his kingdom against the attacks by Alexander II of Imereti in the west, and George II of Kakheti in the east. In August 1509, Alexander took fort-city Gori and the northwestern corner of Kartli, but had to abandon the occupied lands to David due to the Ottoman raid on Imereti in 1510. A year later, George of Kakheti surged into Kartli, but failed to capture the king in a besieged castle of Ateni. In 1513, George invaded again, only to be defeated and taken prisoner by David’s younger brother Bagrat I of Mukhrani. He died in captivity and his kingdom was annexed to Kartli. In 1518, the Persian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Corporation
The Australian Broadcasting Corporation (ABC) is the national broadcaster of Australia. It is principally funded by direct grants from the Australian Government and is administered by a government-appointed board. The ABC is a publicly-owned body that is politically independent and fully accountable, with its charter enshrined in legislation, the ''Australian Broadcasting Corporation Act 1983''. ABC Commercial, a profit-making division of the corporation, also helps to generate funding for content provision. The ABC was established as the Australian Broadcasting Commission on 1 July 1932 by an act of federal parliament. It effectively replaced the Australian Broadcasting Company, a private company established in 1924 to provide programming for A-class radio stations. The ABC was given statutory powers that reinforced its independence from the government and enhanced its news-gathering role. Modelled after the British Broadcasting Corporation (BBC), which is funded by a tel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Australia Bank
National Australia Bank (abbreviated NAB, branded nab) is one of the four largest financial institutions in Australia (colloquially referred to as "The Big Four") in terms of market capitalisation, earnings and customers. NAB was ranked 21st-largest bank in the world measured by market capitalisation and 52nd- largest bank in the world as measured by total assets in 2019. , NAB operated 3,500 Bank@Post locations—including 7,000+ ATMs across Australia, New Zealand, and Asia—and served 9 million customers. NAB has an "AA-" long-term issuer rating by Standard & Poor's. History Early history National Australia Bank was formed as National Commercial Banking Corporation of Australia Limited in 1982 by the merger of National Bank of Australasia and the Commercial Banking Company of Sydney. The resulting company was subsequently renamed National Australia Bank Limited. The expanded financial base of the merged entity triggered significant offshore expansion over ensuing years. R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barclays De Zoete Wedd
Barclays () is a British multinational universal bank, headquartered in London, England. Barclays operates as two divisions, Barclays UK and Barclays International, supported by a service company, Barclays Execution Services. Barclays traces its origins to the goldsmith banking business established in the City of London in 1690. James Barclay became a partner in the business in 1736. In 1896, twelve banks in London and the English provinces, including Goslings Bank, Backhouse's Bank and Gurney, Peckover and Company, united as a joint-stock bank under the name Barclays and Co. Over the following decades, Barclays expanded to become a nationwide bank. In 1967, Barclays deployed the world's first cash dispenser. Barclays has made numerous corporate acquisitions, including of London, Provincial and South Western Bank in 1918, British Linen Bank in 1919, Mercantile Credit in 1975, the Woolwich in 2000 and the North American operations of Lehman Brothers in 2008. Barclays has a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LTCM
Long-Term Capital Management L.P. (LTCM) was a highly-leveraged hedge fund. In 1998, it received a $3.6 billion bailout from a group of 14 banks, in a deal brokered and put together by the Federal Reserve Bank of New York. LTCM was founded in 1994 by John Meriwether, the former vice-chairman and head of bond trading at Salomon Brothers. Members of LTCM's board of directors included Myron Scholes and Robert C. Merton, who three years later in 1997 shared the Nobel Prize in Economics for having developed the Black–Scholes model of financial dynamics.''A financial History of the United States Volume II: 1970–2001'', Jerry W. Markham, Chapter 5: "Bank Consolidation", M. E. Sharpe, Inc., 2002 LTCM was initially successful, with annualized returns (after fees) of around 21% in its first year, 43% in its second year and 41% in its third year. However, in 1998 it lost $4.6 billion in less than four months due to a combination of high leverage and exposure to the 1997 Asian fin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
