Portfolio theory; Asset pricing theory; Asset-liability modelling; Microstructure of financial markets; Carbon emission trading; Information transfer; Return predicatability; Market integration; Trading strategies; Capital structure; Liquidity and co-liquidity; Volatility modelling; Time series econometric analysis.

Boulis joined the Department of Accountancy and Finance as a Lecturer in 1996, and teaches on both the School's undergraduate and postgraduate courses. He has a BSc. in Actuarial Science from The London School of Economics and Political Schience, an MSc in Finance and a Ph.D. in Accounting and Finance from the University of Strathclyde and is a Fellow of the Higher Education Academy (HEA). He was a member of the Energy Theme Committee that shaped Heriot Watt University's future plans in Energy and is currently a member of the Energy Academy (EA), Centre for Finance and Investment (CFI) and Spatial Economics and Econometrics Centre at Heriot Watt. He held various administrative positions and is currently the Head of the Finance Subject Area Group. He has published in internationally-renowned journals such as the Journal of International Money and Finance, Journal of Banking and Finance and the Journal of Financial Markets, and currently supervises three Ph.D. students in microstructure and ethical finance.