On a hectic day of corporate reporting by Irish firms the ISEQ closed 37 points lower at 5,929 flat in line with other European equity markets.
AIB reported a 10 per cent rise in pre-tax profits to euro 1.2 billion but the shares fell 8 cents to euro 12.0 on profit taking.
Online security company Baltimore took a heavy hit in London after saying losses had widened due to its expansion plans and fears of a slowdown in the United States. Baltimore fell 10 per cent to £2.82.
Greencore gained 5 cents to euro 3.05 on the day it announced the appointment of new chairman Mr Patrick Barry. Ryanair fell 3 cents to euro 12.22. Earlier the low-cost airline announced the opening of seven new routes in its summer schedule.
Eircom had another torrid day falling to a new low of 2.33 before closing at 2.40 as Vodafone came under sustained selling pressure in London.
London shares closed down but well off their earlier lows after a surprise Nasdaq recovery.
The FTSE 100 index closed 7.7 points lower at 5,972.28. Gains in drug stocks helped to offset a further pasting for technology and telecoms issues.
Telecom giant Vodafone closed at £1.83, down 3.5 per cent on the day.