I have an IRA in american funds that have been loosing money,should i keep it or bank the money.?

4 sections each funds A 1=New perspective 2=Smallcap world fund 3=investment company of America 4= American Balanced ,in recent months they have been loosing money in october 2007 it was 8,100.00 in april 2008 down to 7,200.00 what advice do you have.