Articles scientifiques

Catching Falling Knives: Speculating on Liquidity Shocks

J. E. COLLIARD

Management Science

août 2017, vol. 63, n°8, pp.2573-2591

Départements : Finance, GREGHEC (CNRS)

Mots clés : supply information • nonfundamental uncertainty • market crashes • arbitrage • high-frequency trading

http://pubsonline.informs.org/doi/pdf/10.1287/mnsc.2016.2440


Many market participants invest resources to acquire information about liquidity rather than fundamentals. I show that agents using such information can reduce the magnitude of short-lived pricing errors by trading against liquidity shocks. However, the short-run stabilizing effect of this behavior also makes it more difficult to identify liquidity shocks, a signal-jamming effect that slows down price discovery in the long run. As more agents invest in nonfundamental information, market prices become more resilient to liquidity shocks but also recover more slowly from temporary price deviations.

CoMargin

J. A. CRUZ LOPEZ, J. HARRIS, C. HURLIN, C. PERIGNON

Journal of Financial and Quantitative Analysis

septembre 2017, vol. 52, n°5, pp.2183–2215

Départements : Finance, GREGHEC (CNRS)

Mots clés : Collateral, Counterparty Risk, Derivatives Markets, Extreme Dependence

https://depts.washington.edu/jfqa/2016/02/25/comargin/


We present CoMargin, a new methodology to estimate collateral requirements in derivatives central counterparties (CCPs). CoMargin depends on both the tail risk of a given market participant and its interdependence with other participants. Our approach internalizes trading externalities and enhances the stability of CCPs, thus, reducing systemic risk concerns. We assess our methodology using proprietary data from the Canadian Derivatives Clearing Corporation that includes daily observations of the actual trading positions of all of its members from 2003 to 2011. We show that CoMargin outperforms existing margining systems by stabilizing the probability and minimizing the shortfall of simultaneous margin-exceeding losses

Dynamic Dependence and Diversification in Corporate Credit

Peter CHRISTOFFERSEN, Kris JACOBS, Xisong JIN, H. LANGLOIS-BERTRAND

Review of Finance

2017, pp.1-40

Départements : Finance, GREGHEC (CNRS)

Mots clés : Credit risk, Default risk, CDS, Dynamic dependence, Copula

https://academic.oup.com/rof/article/doi/10.1093/rof/rfx034/3980187/Dynamic-Dependence-and-Diversification-in


We characterize dependence in corporate credit and equity returns for 215 firms using a new class of large-scale dynamic copula models. Copula dependence and especially tail dependence are highly variable and persistent, increase significantly in the financial crisis, and have remained high since. The most drastic increases in credit dependence occur in July/August of 2007 and in August of 2011 and the decrease in diversification potential caused by the increases in dependence and tail dependence is large. Credit default swap correlation dynamics are important determinants of credit spreads

Financial Transaction Taxes, Market Composition, and Liquidity

J. E. COLLIARD, Peter HOFFMANN

The Journal of Finance

décembre 2017, vol. 72, n°6, pp.2685–2716

Départements : Finance, GREGHEC (CNRS)

Mots clés : Financial transaction tax, institutional trading, liquidity, high-frequency trading

http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2215788


We use the introduction of a financial transaction tax (FTT) in France in 2012 to test competing theories on the impact of FTTs. We find no support for the idea that an FTT improves market quality by affecting the composition of trading volume. Instead, our results are in line with the idea that a lower trading volume reduces liquidity, and thereby market quality. Consistent with theories of asset pricing under transaction costs, we document a shift in security holdings from short-term to long-term institutional investors. More generally, our findings confirm that moderate aggregate effects on market quality can mask large adjustments made by individual market participants

Health Cost Risk: A Potential Solution to the Annuity Puzzle

K. PEIJNENBURG, T. NIJMAN, B. J. M. WERKER

Economic Journal

aout 2017, vol. 127, n°603, pp.1598–1625

Départements : Finance, GREGHEC (CNRS)

Mots clés : Life-cycle portfolio choice;retirement;post-retirement investment

http://onlinelibrary.wiley.com/doi/10.1111/ecoj.12354/abstract


We find that health cost risk lowers optimal annuity demand at retirement. If medical expenses can be sizeable early in retirement, full annuitisation at retirement is no longer optimal because agents do not have enough time to build a liquid wealth buffer. Furthermore, large deviations from optimal annuitisation levels lead to small utility differences. Our results suggest that health cost risk can explain a large proportion of empirically observed annuity choices. Finally, allowing additional annuitisation after retirement results in welfare gains of at most 2.5% when facing health cost risk, and negligible gains without this risk


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