Margin Rules, Informed Trading in Derivatives and Price Dynamics

Kose John, A. Koticha and R. Narayanan

New York University, Leonard N. Stern School Finance Department Working Paper Seires from New York University, Leonard N. Stern School of Business-

Abstract: We analyze the impact of option trading and margin rules on the behavior of informed traders and on the microstructure of stock and option markets. In the absence of binding margin requirements, the introduction of an options market causes informed traders to exhibit a relative trading bias towards the stock because of its greater information sensitivity. In turn, this widens the stock's bid-ask spread. But when informed traders are subject to margin requirements, their bias towards the stock is enhanced or mitigated depending on the leverage provided by the option relative to the stock, leading to wider or narrower stock bid-ask spreads. The introduction of option trading, with or without margin requirements, unambiguously improves the informational efficiency of stock prices. Margin rules improve market efficiency when stock margins and options margins (relative to stock margins) are sufficiently large or small but not when they are of moderate size.

References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.stern.nyu.edu/fin/workpapers/papers99/wpa99047b.pdf (application/pdf)
Our link check indicates that this URL is bad, the error code is: 404 Not Found (http://www.stern.nyu.edu/fin/workpapers/papers99/wpa99047b.pdf [301 Moved Permanently]--> https://www.stern.nyu.edu/fin/workpapers/papers99/wpa99047b.pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:fth:nystfi:99-047

Access Statistics for this paper

More papers in New York University, Leonard N. Stern School Finance Department Working Paper Seires from New York University, Leonard N. Stern School of Business- U.S.A.; New York University, Leonard N. Stern School of Business, Department of Economics . 44 West 4th Street. New York, New York 10012-1126. Contact information at EDIRC.
Bibliographic data for series maintained by Thomas Krichel ().