I have been slightly cryptic in that I would hope the newer players would sort of try to learn how to do it themselves.
The current TAG does not really matter, only the new one. But if ASTAR has a current TAG of 50 and it is going down about 25, to about 25, you would have to then compare the current price of ASTAR to the EAP (Estimated Adjust Price) to see if it is a long or short. If the current price were 20, it is a long. If the current price is 30, then it is a short.
Why would a StarBond which is losing a lot in the TAG be a long, you might ask? Yes, you may! Perhaps in the intevening time since the last adjust the value of the bond dropped way below the EAP, so it will go up to the new TAG, even if that TAG is way lower than the old one.
Another point, brought up below. It is possible for ASTAR to lose and gain movies of about the same value and still be adjusting by a big amount. It is, once again, the question of comparing the current price to the EAP.
I post these, blatantly to help the fund, but I always show the math. But I am trying to help players see how these things work.