Professor Owain Ap Gwilym
Deputy Head of School / Profess, Lead

Contact info
Professor Owain ap Gwilym
Division: Financial Studies
Location: Room 1.17, Hen Goleg
Telephone: 01248 38 2176
Email: owain.apgwilym@bangor.ac.uk
- Article › Research › Peer-reviewed
- Published
A random effects ordered probit model for rating migrations
Alsakka, R. & ap Gwilym, O., 1 Sept 2010, In: Finance Research Letters. 7, 3, p. 140-147Research output: Contribution to journal › Article › peer-review
- Published
A substitution effect between price clustering and size clustering in credit default swaps
Meng, L., Verousis, T. & ap Gwilym, O., 1 Apr 2013, In: Journal of International Financial Markets, Institutions and Money. 24, April, p. 139-152Research output: Contribution to journal › Article › peer-review
- Published
An empirical comparison of quoted and implied bid-ask spreads on futures contracts.
ap Gwilym, O. M., Ap Gwilym, O. & Thomas, S., 1 Feb 2002, In: Journal of International Financial Markets, Institutions and Money. 12, 1, p. 81-99Research output: Contribution to journal › Article › peer-review
- Published
An improved algorithm for cleaning Ultra high-frequency data.
ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 1 Feb 2010, In: Journal of Derivatives and Hedge Funds. 15, 4, p. 323-340Research output: Contribution to journal › Article › peer-review
- Published
Are single stock futures used as an alternative during a short-selling ban?
Benzennou, B., ap Gwilym, O. & Williams, G., Jan 2018, In: Journal of Futures Markets. 38, 1, p. 66-82Research output: Contribution to journal › Article › peer-review
- Published
Bid-ask spreads and the liquidity of international bonds.
ap Gwilym, O. M., Ap Gwilym, O., Trevino, L. & Thomas, S. H., 1 Sept 2002, In: Journal of Fixed Income. 12, 2, p. 82-91Research output: Contribution to journal › Article › peer-review
- Published
Commonality in Liquidity across Options and Stock Futures Markets
Benzennou, B., ap Gwilym, O. & Williams, G., Jan 2020, In: Finance Research Letters. 32, 101096.Research output: Contribution to journal › Article › peer-review
- Published
Commonality in equity options liquidity: Evidence from European Markets
Verousis, T., ap Gwilym, O. & Voukelatos, N., 24 May 2016, In: European Journal of Finance. 22, 12, p. 1204-1223Research output: Contribution to journal › Article › peer-review
- Published
Consistent dividend growth investment strategies.
ap Gwilym, O. M., Ap Gwilym, O., Clare, A. D., Seaton, J. & Thomas, S. H., 1 Dec 2009, In: Journal of Wealth Management. 12, 3, p. 113-124Research output: Contribution to journal › Article › peer-review
- Published
Credit default swaps: Theory and Empirical Evidence.
ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Mar 2005, In: Journal of Fixed Income. 14, 4, p. 17-28Research output: Contribution to journal › Article › peer-review
- Published
Deal! Market reactions to the agreement on the EU Covid-19 recovery fund
Pancotto, L., ap Gwilym, O. & Molyneux, P., 31 Jul 2023, In: Journal of Financial Stability.Research output: Contribution to journal › Article › peer-review
- Published
Decreased price clustering in FTSE100 futures contracts following a transfer from floor to electronic trading.
ap Gwilym, O. M., Ap Gwilym, O. & Alibo, E., 1 Jul 2003, In: Journal of Futures Markets. 23, 7, p. 647-659Research output: Contribution to journal › Article › peer-review
- Published
Differences of opinion in sovereign credit signals during the European crisis
Alsakka, R., ap Gwilym, O. M. & Vu, H., 2017, In: European Journal of Finance. 23, p. 859-884Research output: Contribution to journal › Article › peer-review
- Published
Dividend stability, dividend yield and stock returns: UK evidence.
ap Gwilym, O. M., Ap Gwilym, O., Morgan, G. & Thomas, S., 1 Apr 2000, In: Journal of Business Finance and Accounting. 27, 3-4, p. 261-281Research output: Contribution to journal › Article › peer-review
- Published
Dividend yield investment strategies, the payout ration and zero-dividend stocks.
ap Gwilym, O. M., Ap Gwilym, O., Seaton, J. & Thomas, S. H., 1 Dec 2005, In: Journal of Investing. 14, 4, p. 69-74Research output: Contribution to journal › Article › peer-review
- Published
Dividends and Momentum.
ap Gwilym, O. M., Ap Gwilym, O., Clare, A. D., Seaton, J. & Thomas, S. H., 1 Jun 2009, In: Journal of Investing. 18, 2, p. 42-49Research output: Contribution to journal › Article › peer-review
- Published
Does competition improve sovereign credit rating quality?
Vu, H., Alsakka, R. & ap Gwilym, O., Jan 2022, In: Journal of International Financial Markets, Institutions and Money. 76, 101478.Research output: Contribution to journal › Article › peer-review
- Published
Does sovereign creditworthiness affect bank valuations in emerging markets?
Williams, G. L., Alsakka, R. & ap Gwilym, O. M., 10 Feb 2015, In: Journal of International Financial Markets, Institutions and Money. 36, p. 113-129Research output: Contribution to journal › Article › peer-review
- Published
Does the Fed Model travel well?: For short run tactical allocation, yes, but not for the long haul.
ap Gwilym, O. M., Ap Gwilym, O., Seaton, J., Suddason, K. & Thomas, S. H., 1 Sept 2006, In: Journal of Portfolio Management. 33, 1, p. 68-75Research output: Contribution to journal › Article › peer-review
- Published
Does the disclosure of unsolicited sovereign rating status affect bank ratings?
Klusak, P., Alsakka, R. & ap Gwilym, O., Mar 2017, In: British Accounting Review. 49, 2, p. 194-210Research output: Contribution to journal › Article › peer-review
- Published
Explaining international equity valuation ratios: The roles of commodity price inflation and relative asset volatilities
Clare, A., ap Gwilym, O., Seaton, J. & Thomas, S., 2011, In: Journal of Asset Management. 12, p. 11-29Research output: Contribution to journal › Article › peer-review
- Published
Forecasting UK stock market volatility.
ap Gwilym, O. M., McMillan, D., Speight, A. & Ap Gwilym, O., 1 Aug 2000, In: Applied Financial Economics. 10, 4, p. 435-448Research output: Contribution to journal › Article › peer-review
- Published
Forecasting volatility for options pricing for the U.K. stock market.
ap Gwilym, O. M. & Ap Gwilym, O., 1 Jul 2001, In: Journal of Financial Management and Analysis. 14, 2, p. 55-62Research output: Contribution to journal › Article › peer-review
- Published
Foreign exchange market reactions to sovereign credit news
Alsakka, R. & ap Gwilym, O., 1 Jun 2012, In: Journal of International Money and Finance. 31, 4, p. 845-864Research output: Contribution to journal › Article › peer-review
- Published
Fractional versus decimal pricing: evidence from the UK Long Gilt futures market.
ap Gwilym, O. M., Ap Gwilym, O., McManus, I. & Thomas, S., 1 May 2005, In: Journal of Futures Markets. 25, 5, p. 419-442Research output: Contribution to journal › Article › peer-review
- Published
Gold stocks, the gold price and market timing
ap Gwilym, O., Clare, A., Seaton, J. & Thomas, S., 4 Aug 2011, In: Journal of Derivatives and Hedge Funds. 17, p. 266-278Research output: Contribution to journal › Article › peer-review
- Published
Heterogeneity of sovereign rating migrations in emerging countries.
ap Gwilym, O. M., Alsakka, R. & Ap Gwilym, O., 1 Jun 2009, In: Emerging Markets Review. 10, 2, p. 151-165Research output: Contribution to journal › Article › peer-review
- Published
Impact of demographic and economic variables on financial policy purchase timing decisions.
ap Gwilym, O. M., Thomas, L. C., Thomas, S., Tang, L. & Ap Gwilym, O., 1 Sept 2005, In: Journal of the Operational Research Society. 56, 9, p. 1051-1062Research output: Contribution to journal › Article › peer-review
- Published
In Search of Concepts: The Effects of Speculative Demand on Stock Returns
ap Gwilym, O. M., Hasan, I., Wang, Q. & Xie, R., 2 Jun 2016, In: European Financial Management. 22, 3, p. 427-449Research output: Contribution to journal › Article › peer-review
- Published
International evidence on the payout ratio, earnings, dividends, and returns.
ap Gwilym, O. M., Ap Gwilym, O., Seaton, J., Suddason, K. & Thomas, S. H., 1 Jan 2006, In: Financial Analysts Journal. 62, 1, p. 36-53Research output: Contribution to journal › Article › peer-review
- Published
Intra-day volatility components in FTSE-100 stock index futures.
ap Gwilym, O. M., Speight, A. E., McMillan, D. G. & Ap Gwilym, O., 1 Jan 2000, In: Journal of Futures Markets. 20, 5, p. 425-444Research output: Contribution to journal › Article › peer-review
- Published
Investors’ heterogeneous beliefs and the impact of sovereign credit ratings in foreign exchange and equity markets
Tran, V., Alsakka, R. & ap Gwilym, O., 2 Sept 2019, In: European Journal of Finance. 25, 13, p. 1211-1233Research output: Contribution to journal › Article › peer-review
- Published
Leads and lags in sovereign credit ratings.
Alsakka, R. & ap Gwilym, O. M., 1 Nov 2010, In: Journal of Banking and Finance. 34, 11, p. 2614-2626Research output: Contribution to journal › Article › peer-review
- Published
Market impact under a new regulatory regime: Credit rating agencies in Europe
Alsakka, R., ap Gwilym, O., Klusak, P. & Tran, V., 28 Jun 2015, In: Economic Notes. 44, 2, p. 275-308Research output: Contribution to journal › Article › peer-review
- Published
Market reactions to the implementation of the Banking Union in Europe
Pancotto, L., ap Gwilym, O. & Williams, J., 23 May 2020, In: European Journal of Finance. 26, 7-8, p. 640-665Research output: Contribution to journal › Article › peer-review
- Published
Market structure and microstructure, in international interest rate futures markets.
ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Sept 2010, In: Research in International Business and Finance. 24, 3, p. 253-266Research output: Contribution to journal › Article › peer-review
- Published
Microstructure effects, bid-asks spreads and volatility in the spot foreign exchange market pre and post-EMU.
ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Sept 2006, In: Global Finance Journal. 17, 1, p. 23-49Research output: Contribution to journal › Article › peer-review
- Published
Modelling sovereign credit ratings: Neural networks versus ordered probit.
Bennell, J. A., Crabbe, D., Thomas, S., ap Gwilym, O. & Ap Gwilym, O., 1 Apr 2006, In: Expert Systems with Applications. 30, 3, p. 415-425Research output: Contribution to journal › Article › peer-review
- Published
Open interest, cross listing, and information shocks.
Aguenaou, S., ap Gwilym, O. M. & Rhodes, M., 5 Nov 2010, In: Journal of Futures Markets. 31, 8, p. 755-778Research output: Contribution to journal › Article › peer-review
- Published
Payment history, past returns and the performance of UK zero dividend stocks.
ap Gwilym, O. M., McManus, I. D., Ap Gwilym, O. & Thomas, S. H., 1 Jan 2006, In: Managerial Finance. 32, 6, p. 518-536Research output: Contribution to journal › Article › peer-review
- Published
Price Clustering in Individual Equity Options: Moneyness, Maturity, and Price Level
ap Gwilym, O. M. & Verousis, T., 1 Jan 2013, In: Journal of Futures Markets. 33, 1, p. 55-76Research output: Contribution to journal › Article › peer-review
- Published
Price and momentum as robust tactical approaches to global equity investing.
ap Gwilym, O. M., Ap Gwilym, O., Clare, A., Seaton, J. & Thomas, S., 1 Oct 2010, In: Journal of Investing. 19, 3, p. 80-91Research output: Contribution to journal › Article › peer-review
- Published
Price clustering and underpricing in the IPO aftermarket.
ap Gwilym, O. M., Ap Gwilym, O. & Verousis, T., 1 Mar 2010, In: International Review of Financial Analysis. 19, 2, p. 89-97Research output: Contribution to journal › Article › peer-review
- Published
Price clustering under floor and electronic trading.
Bennell, J. & ap Gwilym, O., 1 Jan 2000, In: Derivatives Use, Trading and Regulation. 5, 4, p. 354-362Research output: Contribution to journal › Article › peer-review
- Published
Problems encountered when using high frequency financial market data: suggested solutions.
ap Gwilym, O. M., Ap Gwilym, O. & Sutcliffe, C., 1 Jan 2001, In: Journal of Financial Management and Analysis. 14, 1, p. 38-51Research output: Contribution to journal › Article › peer-review
- Published
Prospective utility and the equity risk premium.
ap Gwilym, O. M., Thomas, S., Ap Gwilym, O. & McManus, I., 1 Jan 2007, In: Professional Investor. 17, 7, p. 24-28Research output: Contribution to journal › Article › peer-review
- Published
Prospective utility and time-varying optimal asset allocation for the UK: 1803-1995.
ap Gwilym, O. M., McManus, I., Ap Gwilym, O. & Thomas, S., 25 Jul 2009, In: International Journal of Behavioural Accounting and Finance. 1, 2, p. 95-110Research output: Contribution to journal › Article › peer-review
- Published
Rating agencies' credit signals: An analysis of sovereign watch and outlook
Alsakka, R. & ap Gwilym, O., 1 Jan 2012, In: International Review of Financial Analysis. 21, p. 45-55Research output: Contribution to journal › Article › peer-review
- Published
Rating agencies’ signals during the European sovereign debt crisis: Market impact and spillovers
Alsakka, R. & ap Gwilym, O. M., 1 Jan 2013, In: Journal of Economic Behavior and Organization. 85, p. 144-162Research output: Contribution to journal › Article › peer-review
- Published
Regulating rating agencies: A conservative behavioural change
Jones, L., Alsakka, R., ap Gwilym, O. & Mantovan, N., Jun 2022, In: Journal of Financial Stability. 60, 100999.Research output: Contribution to journal › Article › peer-review
- Published
Return reversals and the compass rose: insights from high frequency options data
ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 1 Sept 2011, In: European Journal of Finance. 17, 9-10, p. 883-896Research output: Contribution to journal › Article › peer-review
- Published
Size clustering in the FTSE100 index futures market.
ap Gwilym, O. M., Ap Gwilym, O. & Meng, L., 1 May 2010, In: Journal of Future Markets. 30, 5, p. 432-443Research output: Contribution to journal › Article › peer-review
- Published
Sovereign rating actions and the implied volatility of stock index options
Tran, V., Alsakka, R. & ap Gwilym, O. M., 5 Jun 2014, In: International Review of Financial Analysis. 34, p. 101-113Research output: Contribution to journal › Article › peer-review
- Published
Sovereign rating actions: is the criticism justified?
Alsakka, R. & ap Gwilym, O., 1 Dec 2011, In: Intereconomics : review of European economic policy. 46, 5, p. 248-253Research output: Contribution to journal › Article › peer-review
- Published
Speculate against speculative demand
ap Gwilym, O. M., Ap Gwilym, O., Kita, A. & Wang, Q., 26 Mar 2014, In: International Review of Financial Analysis. 34, p. 212-221Research output: Contribution to journal › Article › peer-review
- Published
Split sovereign ratings and rating migrations in emerging economies.
ap Gwilym, O. M., Alsakka, R. & Ap Gwilym, O., 1 Jun 2010, In: Emerging Markets Review. 11, 2, p. 79-97Research output: Contribution to journal › Article › peer-review
- Published
Structural changes, bid-ask spread composition and tick size in inter-bank futures trading.
McGroarty, F., ap Gwilym, O. M. & Thomas, S., 1 Apr 2011, In: European Journal of Finance. 17, 4, p. 285-306Research output: Contribution to journal › Article › peer-review
- Published
Tactical Equity Investing Across Bull and Bear Markets
ap Gwilym, O., Clare, A., Seaton, J. & Thomas, S., 1 Mar 2012, In: Journal of Wealth Management. p. 61-69Research output: Contribution to journal › Article › peer-review
- Published
Technical analysis as a sentiment barometer and the cross-section of stock returns
Ding, W., Mazouz, K., ap Gwilym, O. & Wang, Q., Nov 2023, In: Quantitative Finance. 23, 11, p. 1617-1636Research output: Contribution to journal › Article › peer-review
- Published
The European Bank Recovery and Resolution Directive: A market assessment
Pancotto, L., ap Gwilym, O. & Williams, J., Oct 2019, In: Journal of Financial Stability. 44Research output: Contribution to journal › Article › peer-review
- Published
The Impact of Regulatory Reforms on European Bank Behaviour: A Dynamic Structural Estimation
Jones, L., Alsakka, R., ap Gwilym, O. & Mantovan, N., Nov 2022, In: European Economic Review. 150, 104280.Research output: Contribution to journal › Article › peer-review
- Published
The Impact of a Premium-Based Tick Size on Equity Option Liquidity
Verousis, T., ap Gwilym, O. & Voukelatos, N., 7 Mar 2016, In: Journal of Futures Markets. 36, 4, p. 397-417Research output: Contribution to journal › Article › peer-review
- Published
The Use of Credit Ratings in Investment Management in the US and Europe
ap Gwilym, O. M., Cantor, R., Ap Gwilym, O. & Thomas, S., 1 Oct 2007, In: Journal of Fixed Income. 17, 2, p. 13-26Research output: Contribution to journal › Article › peer-review
- Published
The causes and extent of split sovereign credit ratings in emerging markets.
Alsakka, R. & ap Gwilym, O., 1 Jan 2012, In: Emerging Markets Finance and Trade. 48, 1, p. 4-24Research output: Contribution to journal › Article › peer-review
- Published
The characteristics and evolution of credit default swap trading.
ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Nov 2007, In: Journal of Derivatives and Hedge Funds. 13, 3, p. 186-198Research output: Contribution to journal › Article › peer-review
- Published
The components of electronic inter-dealer spot FX bid-ask spreads.
ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Nov 2007, In: Journal of Business Finance and Accounting. 34, 9-10, p. 1635-1650Research output: Contribution to journal › Article › peer-review
- Published
The credit signals that matter most for sovereign bond spreads with split rating
Vu, H., Alsakka, R. & ap Gwilym, O. M., May 2015, In: Journal of International Money and Finance. 53, p. 174-191Research output: Contribution to journal › Article › peer-review
- Published
The determinants of CDS bid-ask spreads.
ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Oct 2008, In: Journal of Derivatives. 16, 1, p. 70-80Research output: Contribution to journal › Article › peer-review
- Published
The determinants of trading volume for cross-listed Euribor futures contracts.
ap Gwilym, O. M., Ap Gwilym, O., Aguenaou, S. & Rhodes, M., 1 Jan 2009, In: European Journal of Finance. 15, 1, p. 89-102Research output: Contribution to journal › Article › peer-review
- Published
The evolution and determinants of the non-performing loan burden in Italian banking
Pancotto, L., ap Gwilym, O. & Williams, J., Apr 2024, In: Pacific-Basin Finance Journal. 84, 102306.Research output: Contribution to journal › Article › peer-review
- Published
The impact of ESMA regulatory identifiers on the quality of ratings
Klusak, P., Alsakka, R. & ap Gwilym, O., Nov 2019, In: International Review of Financial Analysis. 66, 101365.Research output: Contribution to journal › Article › peer-review
- Published
The impact of sovereign rating actions on bank ratings in emerging markets
ap Gwilym, O. M., Williams, G. L. & Alsakka, R., 1 Feb 2013, In: Journal of Banking and Finance. 37, 2, p. 563-577Research output: Contribution to journal › Article › peer-review
- Published
The implications of a price anchoring effect at the upstairs market of the London Stock Exchange
Verousis, T. & ap Gwilym, O., Mar 2014, In: International Review of Financial Analysis. 32, p. 37-46Research output: Contribution to journal › Article › peer-review
- Published
The influence of rating levels and rating convergence on the spillover effects of sovereign credit actions
Abad, P., Alsakka, R. & ap Gwilym, O., Jul 2018, In: Journal of International Money and Finance. 85, p. 40-57Research output: Contribution to journal › Article › peer-review
- Published
The intraday determination of liquidity in the NYSE LIFFE equity option markets
Verousis, T., ap Gwilym, O. & Chen, X., 13 Mar 2015, In: European Journal of Finance.Research output: Contribution to journal › Article › peer-review
- Published
The lead-lag relationship between the FTSE100 stock index and its derivative contracts.
ap Gwilym, O. M., Ap Gwilym, O. & Buckle, M., 1 Aug 2001, In: Applied Financial Economics. 11, 4, p. 385-393Research output: Contribution to journal › Article › peer-review
- Published
The role of payout ratio in the relationship between stock returns and dividend yield.
ap Gwilym, O. M., McManus, I., Ap Gwilym, O. & Thomas, S., 1 Nov 2004, In: Journal of Business Finance and Accounting. 31, 9-10, p. 1355-1387Research output: Contribution to journal › Article › peer-review
- Published
The role of private information in return volatility, bid-ask spreads and price levels in the foreign exchange market.
McGroarty, F., ap Gwilym, O. M. & Thomas, S., 1 Apr 2009, In: Journal of International Financial Markets, Institutions and Money. 19, 2, p. 387-401Research output: Contribution to journal › Article › peer-review
- Published
The sovereign-bank rating channel and rating agencies' downgrades during the European debt crisis
ap Gwilym, O. M., Alsakka, R., Ap Gwilym, O. & Vu, T. N., 13 Apr 2014, In: Journal of International Money and Finance. 49, part B, p. 235-257Research output: Contribution to journal › Article › peer-review
- Published
Trade size clustering and the cost of trading at the London Stock Exchange
ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 18 Sept 2012, In: International Review of Financial Analysis.Research output: Contribution to journal › Article › peer-review
- Published
Very long term equity investment strategies: real stock prices and mean reversion.
ap Gwilym, O. M., Ap Gwilym, O., Seaton, J. & Thomas, S., 1 Jun 2008, In: Journal of Investing. 17, 2, p. 15-23Research output: Contribution to journal › Article › peer-review
- Published
Volatility Transmission Among the CDS, Equity, and Bond Markets.
ap Gwilym, O. M., Meng, L., Ap Gwilym, O. & Varas, J., 1 Nov 2009, In: Journal of Fixed Income. 18, 3, p. 33-46Research output: Contribution to journal › Article › peer-review
- Published
What drives differences of opinion in sovereign ratings? The roles of information disclosure and political risk
Vu, H., Alsakka, R. & ap Gwilym, O., Jul 2017, In: International Journal of Finance and Economics. 22, 3, p. 216-233Research output: Contribution to journal › Article › peer-review
- Chapter › Research › Not peer-reviewed
- Published
Evidence on trading mechanisms.
ap Gwilym, O. M., Ap Gwilym, O., Board, J. (Editor), Sutclifee, C. (Editor) & Wells, S. (Editor), 1 Jan 2002, Transparency and Fragmentation: Financial Market Regulation in a Dynamic Environment. 2002 ed. Palgrave Macmillan, p. 101-140Research output: Chapter in Book/Report/Conference proceeding › Chapter
- Published
Futures market liquidity under floor and electronic trading.
ap Gwilym, O. M., McManus, I., Ap Gwilym, O., Thomas, S., Morrey, J. (Editor) & Guyton, A. (Editor), 1 Jan 2009, Liquidity: Interest Rates and Banking. 2009 ed. Nova Science, p. 111-138Research output: Chapter in Book/Report/Conference proceeding › Chapter