What happened to all of J's mutual funds on Friday? They all dropped a ton...?

I had the same problem with the J Overseas Fund. It apparently has to do with year end distributions. If you go to their website j.com and check the closing prices for their funds, you should see a closing price that matches your brokers quote, but the change will be more like (1.5%) instead of (20%). Mine was (10%) per Ameritrade, but (1.4%) per J. It should be corrected on Monday. If not I would call your broker.