Stock Market People....A Question

[tanner12oz]

i have a moderate investment in the legg mason investors value o fund (SAIFX). generally it moves with the dow jones. couple cents up couple cents down. more up then down but today the dow went up 28 points and the fund i own dropped $1.80 cents. thats a very large swing for this fund. i browsed the net and didnt see any major news on the fund or imminent doom for the market.......so whats up with it today??? any ideas? im in for the long haul but i like to know whats going on....losing thousands of dollars in a day with no explanation isnt cool. anybody?