1. Cyhoeddwyd

   The influence of rating levels and rating convergence on the spillover effects of sovereign credit actions

   Abad, P., Alsakka, R. & ap Gwilym, O., Gorff 2018, Yn: Journal of International Money and Finance. 85, t. 40-57

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

2. Cyhoeddwyd

   Open interest, cross listing, and information shocks.

   Aguenaou, S., ap Gwilym, O. M. & Rhodes, M., 5 Tach 2010, Yn: Journal of Futures Markets. 31, 8, t. 755-778

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

3. Cyhoeddwyd

   Market impact under a new regulatory regime: Credit rating agencies in Europe

   Alsakka, R., ap Gwilym, O., Klusak, P. & Tran, V., 28 Meh 2015, Yn: Economic Notes. 44, 2, t. 275-308

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

4. Cyhoeddwyd

   Foreign exchange market reactions to sovereign credit news

   Alsakka, R. & ap Gwilym, O., 1 Meh 2012, Yn: Journal of International Money and Finance. 31, 4, t. 845-864

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

5. Cyhoeddwyd

   Leads and lags in sovereign credit ratings.

   Alsakka, R. & ap Gwilym, O. M., 1 Tach 2010, Yn: Journal of Banking and Finance. 34, 11, t. 2614-2626

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

6. Cyhoeddwyd

   Rating agencies' credit signals: An analysis of sovereign watch and outlook

   Alsakka, R. & ap Gwilym, O., 1 Ion 2012, Yn: International Review of Financial Analysis. 21, t. 45-55

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

7. Cyhoeddwyd

   Sovereign rating actions: is the criticism justified?

   Alsakka, R. & ap Gwilym, O., 1 Rhag 2011, Yn: Intereconomics : review of European economic policy. 46, 5, t. 248-253

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

8. Cyhoeddwyd

   Differences of opinion in sovereign credit signals during the European crisis

   Alsakka, R., ap Gwilym, O. M. & Vu, H., 2017, Yn: European Journal of Finance. 23, t. 859-884

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

9. Cyhoeddwyd

   A random effects ordered probit model for rating migrations

   Alsakka, R. & ap Gwilym, O., 1 Medi 2010, Yn: Finance Research Letters. 7, 3, t. 140-147

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

10. Cyhoeddwyd

    Rating agencies’ signals during the European sovereign debt crisis: Market impact and spillovers

    Alsakka, R. & ap Gwilym, O. M., 1 Ion 2013, Yn: Journal of Economic Behavior and Organization. 85, t. 144-162

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

11. Cyhoeddwyd

    The causes and extent of split sovereign credit ratings in emerging markets.

    Alsakka, R. & ap Gwilym, O., 1 Ion 2012, Yn: Emerging Markets Finance and Trade. 48, 1, t. 4-24

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

12. Cyhoeddwyd

    Modelling sovereign credit ratings: Neural networks versus ordered probit.

    Bennell, J. A., Crabbe, D., Thomas, S., ap Gwilym, O. & Ap Gwilym, O., 1 Ebr 2006, Yn: Expert Systems with Applications. 30, 3, t. 415-425

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

13. Cyhoeddwyd

    Price clustering under floor and electronic trading.

    Bennell, J. & ap Gwilym, O., 1 Ion 2000, Yn: Derivatives Use, Trading and Regulation. 5, 4, t. 354-362

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

14. Cyhoeddwyd

    Commonality in Liquidity across Options and Stock Futures Markets

    Benzennou, B., ap Gwilym, O. & Williams, G., Ion 2020, Yn: Finance Research Letters. 32, 101096.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

15. Cyhoeddwyd

    Are single stock futures used as an alternative during a short-selling ban?

    Benzennou, B., ap Gwilym, O. & Williams, G., Ion 2018, Yn: Journal of Futures Markets. 38, 1, t. 66-82

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

16. Cyhoeddwyd

    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, Yn: Journal of Asset Management. 12, t. 11-29

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

17. Cyhoeddwyd

    Technical analysis as a sentiment barometer and the cross-section of stock returns

    Ding, W., Mazouz, K., ap Gwilym, O. & Wang, Q., Tach 2023, Yn: Quantitative Finance. 23, 11, t. 1617-1636

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

18. Cyhoeddwyd

    The Impact of Regulatory Reforms on European Bank Behaviour: A Dynamic Structural Estimation

    Jones, L., Alsakka, R., ap Gwilym, O. & Mantovan, N., Tach 2022, Yn: European Economic Review. 150, 104280.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

19. Cyhoeddwyd

    Regulating rating agencies: A conservative behavioural change

    Jones, L., Alsakka, R., ap Gwilym, O. & Mantovan, N., Meh 2022, Yn: Journal of Financial Stability. 60, 100999.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

20. Cyhoeddwyd

    The impact of ESMA regulatory identifiers on the quality of ratings

    Klusak, P., Alsakka, R. & ap Gwilym, O., Tach 2019, Yn: International Review of Financial Analysis. 66, 101365.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

21. Cyhoeddwyd

    Does the disclosure of unsolicited sovereign rating status affect bank ratings?

    Klusak, P., Alsakka, R. & ap Gwilym, O., Maw 2017, Yn: British Accounting Review. 49, 2, t. 194-210

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

22. Cyhoeddwyd

    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 Ebr 2009, Yn: Journal of International Financial Markets, Institutions and Money. 19, 2, t. 387-401

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

23. Cyhoeddwyd

    Structural changes, bid-ask spread composition and tick size in inter-bank futures trading.

    McGroarty, F., ap Gwilym, O. M. & Thomas, S., 1 Ebr 2011, Yn: European Journal of Finance. 17, 4, t. 285-306

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

24. Cyhoeddwyd

    A substitution effect between price clustering and size clustering in credit default swaps

    Meng, L., Verousis, T. & ap Gwilym, O., 1 Ebr 2013, Yn: Journal of International Financial Markets, Institutions and Money. 24, April, t. 139-152

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

25. Cyhoeddwyd

    The European Bank Recovery and Resolution Directive: A market assessment

    Pancotto, L., ap Gwilym, O. & Williams, J., Hyd 2019, Yn: Journal of Financial Stability. 44

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

26. Cyhoeddwyd

    The evolution and determinants of the non-performing loan burden in Italian banking

    Pancotto, L., ap Gwilym, O. & Williams, J., Ebr 2024, Yn: Pacific-Basin Finance Journal. 84, 102306.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

27. Cyhoeddwyd

    Deal! Market reactions to the agreement on the EU Covid-19 recovery fund

    Pancotto, L., ap Gwilym, O. & Molyneux, P., 31 Gorff 2023, Yn: Journal of Financial Stability.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

28. Cyhoeddwyd

    Market reactions to the implementation of the Banking Union in Europe

    Pancotto, L., ap Gwilym, O. & Williams, J., 23 Mai 2020, Yn: European Journal of Finance. 26, 7-8, t. 640-665

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

29. Cyhoeddwyd

    Investors’ heterogeneous beliefs and the impact of sovereign credit ratings in foreign exchange and equity markets

    Tran, V., Alsakka, R. & ap Gwilym, O., 2 Medi 2019, Yn: European Journal of Finance. 25, 13, t. 1211-1233

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

30. Cyhoeddwyd

    Sovereign rating actions and the implied volatility of stock index options

    Tran, V., Alsakka, R. & ap Gwilym, O. M., 5 Meh 2014, Yn: International Review of Financial Analysis. 34, t. 101-113

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

31. Cyhoeddwyd

    The implications of a price anchoring effect at the upstairs market of the London Stock Exchange

    Verousis, T. & ap Gwilym, O., Maw 2014, Yn: International Review of Financial Analysis. 32, t. 37-46

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

32. Cyhoeddwyd

    The Impact of a Premium-Based Tick Size on Equity Option Liquidity

    Verousis, T., ap Gwilym, O. & Voukelatos, N., 7 Maw 2016, Yn: Journal of Futures Markets. 36, 4, t. 397-417

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

33. Cyhoeddwyd

    Commonality in equity options liquidity: Evidence from European Markets

    Verousis, T., ap Gwilym, O. & Voukelatos, N., 24 Mai 2016, Yn: European Journal of Finance. 22, 12, t. 1204-1223

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

34. Cyhoeddwyd

    The intraday determination of liquidity in the NYSE LIFFE equity option markets

    Verousis, T., ap Gwilym, O. & Chen, X., 13 Maw 2015, Yn: European Journal of Finance.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

35. Cyhoeddwyd

    What drives differences of opinion in sovereign ratings? The roles of information disclosure and political risk

    Vu, H., Alsakka, R. & ap Gwilym, O., Gorff 2017, Yn: International Journal of Finance and Economics. 22, 3, t. 216-233

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

36. Cyhoeddwyd

    The credit signals that matter most for sovereign bond spreads with split rating

    Vu, H., Alsakka, R. & ap Gwilym, O. M., Mai 2015, Yn: Journal of International Money and Finance. 53, t. 174-191

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

37. Cyhoeddwyd

    Does competition improve sovereign credit rating quality?  

    Vu, H., Alsakka, R. & ap Gwilym, O., Ion 2022, Yn: Journal of International Financial Markets, Institutions and Money. 76, 101478.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

38. Cyhoeddwyd

    Does sovereign creditworthiness affect bank valuations in emerging markets?

    Williams, G. L., Alsakka, R. & ap Gwilym, O. M., 10 Chwef 2015, Yn: Journal of International Financial Markets, Institutions and Money. 36, t. 113-129

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

39. Cyhoeddwyd

    The components of electronic inter-dealer spot FX bid-ask spreads.

    ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Tach 2007, Yn: Journal of Business Finance and Accounting. 34, 9-10, t. 1635-1650

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

40. Cyhoeddwyd

    The determinants of trading volume for cross-listed Euribor futures contracts.

    ap Gwilym, O. M., Ap Gwilym, O., Aguenaou, S. & Rhodes, M., 1 Ion 2009, Yn: European Journal of Finance. 15, 1, t. 89-102

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

41. Cyhoeddwyd

    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 Ion 2006, Yn: Financial Analysts Journal. 62, 1, t. 36-53

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

42. Cyhoeddwyd

    Evidence on trading mechanisms.

    ap Gwilym, O. M., Ap Gwilym, O., Board, J. (Golygydd), Sutclifee, C. (Golygydd) & Wells, S. (Golygydd), 1 Ion 2002, Transparency and Fragmentation: Financial Market Regulation in a Dynamic Environment. 2002 gol. Palgrave Macmillan, t. 101-140

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

43. Cyhoeddwyd

    Trade size clustering and the cost of trading at the London Stock Exchange

    ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 18 Medi 2012, Yn: International Review of Financial Analysis.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

44. Cyhoeddwyd

    An empirical comparison of quoted and implied bid-ask spreads on futures contracts.

    ap Gwilym, O. M., Ap Gwilym, O. & Thomas, S., 1 Chwef 2002, Yn: Journal of International Financial Markets, Institutions and Money. 12, 1, t. 81-99

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

45. Cyhoeddwyd

    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 Hyd 2007, Yn: Journal of Fixed Income. 17, 2, t. 13-26

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

46. Cyhoeddwyd

    Bid-ask spreads and the liquidity of international bonds.

    ap Gwilym, O. M., Ap Gwilym, O., Trevino, L. & Thomas, S. H., 1 Medi 2002, Yn: Journal of Fixed Income. 12, 2, t. 82-91

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

47. Cyhoeddwyd

    In Search of Concepts: The Effects of Speculative Demand on Stock Returns

    ap Gwilym, O. M., Hasan, I., Wang, Q. & Xie, R., 2 Meh 2016, Yn: European Financial Management. 22, 3, t. 427-449

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

48. Cyhoeddwyd

    Price Clustering in Individual Equity Options: Moneyness, Maturity, and Price Level

    ap Gwilym, O. M. & Verousis, T., 1 Ion 2013, Yn: Journal of Futures Markets. 33, 1, t. 55-76

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

49. Cyhoeddwyd

    The determinants of CDS bid-ask spreads.

    ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Hyd 2008, Yn: Journal of Derivatives. 16, 1, t. 70-80

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

50. Cyhoeddwyd

    Fractional versus decimal pricing: evidence from the UK Long Gilt futures market.

    ap Gwilym, O. M., Ap Gwilym, O., McManus, I. & Thomas, S., 1 Mai 2005, Yn: Journal of Futures Markets. 25, 5, t. 419-442

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid