Whiskey1,
Ok, so it is an ARF. Lets assume you invested €100 in a Cash fund. Over the last 12 months, it might have earned 1% gross. If you take off a typical annual management charge of 0.75%, the net value has only increased to €100.25. At the end of the year you are obliged to drawdown an income of 5% ( or 6% if the value exceeds €2m). Tax at your marginal rate will probably be deducted at source. Therefore your original €100 is now valued at circa €95.
The reality is that if you continue to invest in a Cash fund, the net growth will never cover the income drawdown. Therefore your net value will decrease every year.
You could invest in a Fund that might generate a higher return (to cover the drawdown) but that involves taking some investment risk.
Just to complicate things, you may have got a bonus allocation on entry (say 102%) so your notional value then was €102. But if so, you will be hit with an early exit charge (circa 1% to 5%) if you seek to transfer the funds during the first 5 years.
Since an ARF may ideally have to last 20 years plus in retirement, you do need to consider the investment strategy, whether you can live with some investment risk so as to try to generate a decent growth rate. If not, then your overall value will gradually decrease over time.