IRISH shares fell for the first time in a week, as the European Central Bank left interest rates unchanged.
By the close in Dublin, the ISEQ Overall Index had fallen 0.27pc, or 9.06 points, to 3.302.09.
The market lurched lower at the opening and stayed there for the rest of the day.
The ECB left its benchmark interest rate unchanged at 0.75pc as expected, while Spain continued to resist talk of a sovereign bailout.
"All the major European equity indices, the ISEQ included, are close to flat on the day with the euro trading at a fortnightly high of $1.30," said Investec analyst Justin Doyle.
Few stocks made significant moves either way on what was another session of relatively light trading.
Aryzta continued its recent struggles, falling 2.21pc to €37.60. The speciality baker is yet to shake off bearish sentiment in Ireland at least after reducing its future profit forecasts last week.
Oil companies had a difficult day despite oil prices rising across the globe. Dragon Oil dropped 1.72pc to €7.41.
Construction-based stocks dipped as well, with CRH and Kingspan sliding 1.1pc to €14.62 and 1.63pc to €7.90 respectively.
Elsewhere, markets were little changed following the ECB announcement.
The Stoxx Europe 600 Index decreased less than 0.1pc, while national benchmark indexes declined in 12 of the 18 western European markets.
"In the absence of any positive news from Spain, or any news that might help set the direction, markets are languishing a bit," said Mike Lenhoff, chief strategist at Brewin Dolphin in London.
A gauge of carmakers was the best-performing group on the Stoxx 600.
In London, Halfords surged 14pc, the most since the company listed in 2004, after the company said it expected 2013 profit before tax in the upper half of its previously forecast range.
The company also reported second-half, same-store sales growth that beat analyst estimates.
Tate & Lyle added 1.9pc after Credit Suisse raised its rating on the firm.