With all the interest rates on the rise ie. BOI ,EBS,etc. I currently have mortgage with DCC, whos rates are they based on, so as i know when my mortgage is rising....thanks
They're "based on" whatever the Housing Finance Agency decides at its monthly meetings. So, theoretically, they can go up and down as the HFA chooses.
In practice, movement is nearly always tied to the ECB rate (albeit at a delay of a month or so). The very last ECB decrease wasn't passed on by the HFA but all the previous ones were. You can bet that every ECB increase will be passed on.