We propose a model to describe stock pinning on option expiration dates. We argue that if the open interest in a particular contract is unusually large, Delta-hedging in aggregate by floor market-makers can impact the stock price and drive it to the strike price of the option. We derive a...

We model and study the behavior of bankrupt stocks. We are interested in the dynamics of stocks and options, and in particular the cost of establishing positions with negative delta.This extends a model of Avellaneda and Lipkin which was used to model hard-to-borrow stocks. This model is a...

We study model-driven statistical arbitrage strategies in U.S. equities. Trading signals are generated in two ways: using Principal Component Analysis and using sector ETFs. In both cases, we consider the residuals, or idiosyncratic components of stock returns, and model them as a mean-reverting...

Bid and ask sizes at the top of the order book provide information on short-term price moves. Drawing from classical descriptions of the order book in terms of queues and order-arrival rates (Smith et al (2003)), we consider a diffusion model for the evolution of the best bid/ask queues. We...

The daily rebalancing of a leveraged exchange traded fund(LETF) requires the fund manager to systematically modify the amount of index exposure. In order to achieve the investment objective of the fund, managers of LETFs use total return swaps with the appropriate leverage ratio. This daily...

In this paper we developed an econometric model to empirically test the hard-to-borrow model of Avellaneda and Lipkin (2009) where asset prices jump as result of "buy-in" procedures. The model is estimated using an extent version of simulated maximum likelihood (SML) for a selected group of...

This paper introduces the CORE methodology for managing risk of multi-market central-counterparties. CORE generalizes the classical SPAN method of stress scenarios by incorporating explicitly market liquidity of listed instruments and modeling the liquidity pro file of OTC instruments and the...

Traders worldwide use interest rate options and futures to speculate on future monetary decisions, in particular in countries where the monetary regime is Inflation Targeting (IT). Central Banks under an IT regime tend to define the target rate on scheduled meetings. We propose in this paper a...

Portfolio risk, introduced by Markowitz in 1952, and defined as the standard deviation of the portfolio return, is an important metric in the Modern Portfolio Theory (MPT). A popular method for portfolio selection is to manage the risk and return of a portfolio according to the...

We analyze portfolios constructed from the principal eigenvector of the equity re- turns’ correlation matrix and compare these portfolios with the capitalization weighted market portfolio. It is well known empirically that principal eigenportfolios are a good proxy for the market portfolio. We...