If there are 5 or more movies in the TAG, The TAG or Trailing Average Gross is the total of the last 5 released movies divided by 5. If we call them A, B, C, D, E the formula is
Old TAG= (A + B + C + D+ E)/5
Now here comes that 6th movie, F. It will replace A in the formula, so the new formula is now:
New TAG= (B + C + D + E + F)/5
If you subtract New Tag minus Old Tag and simplify it becomes:
New TAG -OLD TAG = (F - A)/5
As a rule of thumb, (and this is how I post this from time to time) you subtract the old movie total Box (A) from the New movie Total Delist and divide by 5 and this is the adjustment to the TAG at the time of adjust. A negative numer (Old>New) would be a subtraction from the TAG, a positive number is added to the TAG. This number, prior the the Tuesday adjust is referred to as the EAP, the "Estimated Adjust Price," which is not locked in stone until the actuals are known.
Why do you want to know an EAP ? Beacause Bonds are a point to point game. The question is always what will the value be at the next adjust? Once you know the EAP, you have to compare it to the CURRENT price. If the Current Price is > EAP, then you would short the StarBond. If the Current Price is < EAP, then you would buy the StarBond (long)
In the case of JDEPP, as disappointing as LONER was (is?) it still did more business thant TOURI which it replaced in the TAG, so the TAG went up. Had LONER not done as badly, lets say 50 M more at delist, it would have contributed 1/5 of the extra box office (1/5 of 50 is 10) and the adjust would have been at a greater amount. As recently as 3 months ago, LONER was priced at about 140.
HSX players have access to public charts, like How Profitable, or maintain their own. They were anticipation an EAP of about 119 when LONER was up around 140, and invested accordingly. When LONER crashed, investors in JDEPP bailed out and or shorted. This drove the price down. In so doing, it actually dipped below the EAP. As a result, at the end the proper investment was back to long. With all of these back and forth investments, you always have to take the commission (2%) into account on each flip.
A lot of folks who are newer to HSX have troubles understanding the StarBonds system, so I hope I have answered the questions for many others.
Still puzzled? That is why us geezers hang out at the StarsBoard, or at least this one.