Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/33132 
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dc.contributor.authorStein, Jerome L.en
dc.date.accessioned2010-06-11-
dc.date.accessioned2010-07-01T14:14:27Z-
dc.date.available2010-07-01T14:14:27Z-
dc.date.issued2010-
dc.identifier.urihttp://hdl.handle.net/10419/33132-
dc.description.abstractAlan Greenspan's paper (March 2010) presents his retrospective view of the crisis. His theme has several parts. First, the housing price bubble, its subsequent collapse and the financial crisis were not predicted either by the market, the FED, the IMF or the regulators in the years leading to the current crisis. Second, financial intermediation tried to function on too thin layer of capital - high leverage - owing to a misreading of the degree of risk embodied in ever more complex financial products and markets. Third, the breakdown was unpredictable and inevitable, given the 'excessive' leverage - or low capital - of the financial intermediaries. The proposed legislation for the 'reform' of the financial system requires that the FED "identify, measure, manage and mitigate risks to the financial stability of the United States". The focus is upon capital requirements or debt ratios. The 'Quants' ignored systemic risk and just focused upon risk transfer in very liquid markets. The FED, IMF, Treasury and the 'Quants'/market lacked the appropriate tools of analysis to answer the following questions: what is an optimal leverage or capital requirement that balances the expected growth against risk? What are theoretically founded early warning signals of a crisis? The author explains why the application of stochastic optimal control (SOC)/dynamic risk management is an effective approach to determine the optimal degree of leverage, the optimum and excessive risk and the probability of a debt crisis. The theoretically derived early warning signal of a crisis is the excess debt ratio, equal to the difference between the actual and optimal ratio. The excess debt starting from 2004-05 indicated that a crisis was most likely. This SOC analysis should be used by those charged with surveillance of financial markets.en
dc.language.isoengen
dc.publisher|aKiel Institute for the World Economy (IfW) |cKielen
dc.relation.ispartofseries|aEconomics Discussion Papers |x2010-17en
dc.subject.jelC61en
dc.subject.jelG11en
dc.subject.jelG12en
dc.subject.jelG14en
dc.subject.ddc330en
dc.subject.keywordStochastic optimal controlen
dc.subject.keywordwarning signals of crisisen
dc.subject.keywordoptimal leverage and debt ratiosen
dc.subject.stwFinanzmarktkriseen
dc.subject.stwBankenkriseen
dc.subject.stwFinanzsektoren
dc.subject.stwKapitalstrukturen
dc.subject.stwEigenkapitalvorschriftenen
dc.subject.stwRisikomanagementen
dc.subject.stwKontrolltheorieen
dc.subject.stwStochastischer Prozessen
dc.subject.stwFrühwarnsystemen
dc.subject.stwTheorieen
dc.subject.stwUSAen
dc.titleAlan Greenspan, the quants and stochastic optimal control-
dc.typeWorking Paperen
dc.identifier.ppn627767060en
dc.rights.licensehttp://creativecommons.org/licenses/by-nc/2.0/de/deed.enen
dc.identifier.repecRePEc:zbw:ifwedp:201017en

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