I had assumed that the fund would go ex dividend on the last day of the month and that Friday's $.07 drop was because of the big selloff in the bond market. But based on the information at the link it appears the fund went ex dividend on Friday, the date of record was Monday and the dividend will be paid on Tuesday. If that's the case it looks like the fund was flat or up a penny on Friday net of the dividend. I don't know how he managed to avoid a hit on Friday and then go up $.05 today when rates went back down.
Gundlach manages for total return rather than to maximize the current dividend payout, so I expect that the monthly dividend could go down a little when he repositions the portfolio. I think most of the yield of the fund is coming from non-agency mortgage securities and he hasn't suggested he is close to selling those. He was quoted recently as saying he thought the downward move in interest rates over the last several months was about 80% done, which suggests he may be selling some of the 30 year treasuries he's had in the fund for duration. He is having a webcast on September 14 to provide an update.
Despite the schedule on DoubleLine's website it looks like the stock went ex dividend today with a $.06/share drop on a day when the bond market was up. Also, Bloomberg has a story up today with Gundlach saying he has gone from an overweight to a slight underweight on treasuries. He has bought some corporate investment grade and junk debt for the first time in quite a while in the Core Fixed Income Fund. It doesn't say if he's done the same in DBLTX but it should be covered in the September 14 presentation.