look at fidelity ultra short bond fund.  now theres a fund that acted for years like a glorified money market.  it always paid just a tad more then a money market and did so with the false comfort that it was in complete safety.

then boom the credit mess hit, ultra short plunged and has been the worst performer even still being down over 7% for the year.  they had huge amounts of bets in fidelitys central core fund that held lots of this toxic paper,  funds would use these central core funds which were mutual funds for the mutual funds.   it gave them easy ways to invest lots of money fast  or enhance their returns with a little higher yield.   it all collapsed on them hurting alot of their funds

since strategic real return pulled 18% of its money out the returns have been much better. i got back in a few months ago and its my best performer this year.

sprxx must have been using a little to get that extra little kicker of a return and either got caught holding some,   or maybe the reverse, maybe cash reserves added some and sprxx is just a little more conservative.