The Iseq index slipped more than six points to 6,108.2 at the close of business after a what dealers described as a “topsy turvy” day.
Shares dipped after a positive start but rose as oil fell below the $130 a barrel mark in the middle of the day.
The banks all made gains. AIB was up at €13.08, just under 1 per cent, at 4.30pm, while Bank of Ireland advanced at a similar rate to €8.394.
However, the market dipped towards the close of business as oil climbed back up over $130.
The story was much the same in Europe, with markets see-sawing as oil fell and rose. In London, the FTSE 100 index fell by 28.8 points to 6058.5.
Benchmark indices fell in 15 of western Europe’s 18 markets. France's CAC 40 slipped 0.6 per cent and Germany's DAX added 0.1 per cent.
The Dow Jones Stoxx 600, which tracks leading shares across those markets, including Ireland, was down 0.3 per cent at 317.2 at of 4.30pm.
