Team Members

Andy Porter, Managing Director and Head of Business Development

Andy Porter leads Kalotay Analytics in the areas of business development, strategic marketing, channel development, and client services.

Andy is an accomplished business development executive with nearly twenty years of extensive experience in the financial services, software and information technology industries. He has intricate knowledge and in-depth understanding of the financial markets, in particular the areas of market data services, trading solutions, and financial risk management.

Andy holds a BA in Economics, magna cum laude, from Tufts University, and a MBA in Finance from the Wharton School of the University of Pennsylvania.

Deane Yang, PhD - Director of Research

Dr. Deane Yang is the Head of Research at Andrew Kalotay Associates. In this capacity, he is responsible for the research and development of interest rate models and valuation models for fixed income securities and interest rate derivatives. In addition, he oversees the valuation and analysis for AKA's advisory clients.

Deane led the development of the valuation libraries TIPSVal™ for inflation-indexed bonds, FloatVal™ for floating rate and structured notes, and CurvePlus™ for yield curve analytics. In the past Deane has developed the SwapSpread™ asset swaps calculator, SwapVal™ interest rate derivatives valuation library, and AgencyBondPricer™, a desktop application for pricing agency debentures. He is also the co-inventor, in collaboration with Andy Kalotay, the CLEAN™ mortgage-backed security valuation library, and Volatility Reduction Measure for FAS 133 hedge effectiveness testing.

Along with Andy, he was an advisor to the Bond Market Association (BMA, now SIFMA) task force on the new quotation formula for large agency European-type callable securities (ECS). Deane authored the BMA guidelines for implementation of the new convention and provided a spreadsheet-based BMA ECS calculator for practitioners.

Deane has previously worked at Sumitomo Bank Capital Markets, where he worked on credit risk, VaR, and interest rate derivative pricing models.

A Professor of Mathematics at Polytechnic Institute of New York University, he has held faculty positions at the Courant Institute of Mathematical Sciences at New York University, Columbia University, and Rice University. His academic research areas include convex geometry, geometric and analytic inequalities, and Riemannian geometry. Deane received a BA in Mathematics and Physics from the University of Pennsylvania and a PhD in Mathematics from Harvard University.

Leslie Abreo, Director of Product Development

Leslie Abreo directs new product development and manages client support at Andrew Kalotay Associates, as well as overseeing the company’s finance and operations functions.

He recently directed the development of iteRate™, a program that extracts implied optionless yield curves from callable tax-exempt curves. He has co-authored papers on various topics of debt management with Andy Kalotay including bond insurance, debt refunding, tax-driven transactions, and hedge effectiveness testing.

Leslie holds a BBA in Finance, summa cum laude, from Baruch College and an MS in Financial Engineering from Polytechnic University. He has completed several advanced level graduate courses at the Courant Institute of Mathematical Sciences at New York University.

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Jinghua Qian, PhD - Senior Quantitative Analyst

Dr. Jinghua Qian is a senior quantitative analyst at Andrew Kalotay Associates. Since joining AKA in April 2005, Jinghua co-wrote two research papers with Andy Kalotay on applying fixed-income valuation models and option-adjusted spread (OAS) technology to identify the optimal strategy to select and refinance residential mortgages.

She holds a BA in Mathematics from Tsinghua University in Beijing and received her PhD in Mathematics from Tufts University.

Jinghua is a faculty member of the Department of Mathematics at Polytechnic University, and previously taught at Bucknell University. Her academic research includes partial sum processes, empirical processes, and their applications in statistics.