This trust is down because the export of iron ore is stopped. The winter weather at the Soo lock has closed the lock for 4 to 6 weeks. Around 1 March the lock will reopen and the trust will bounce back. This is normal for MSB.
"Sound" or simplistic, whatever, I think almost everything ous wrote is wrong. Do you really believe the stock is down from 58 to 34 because everyone knows the locks close every Jan-Mar, and because every May distribution is much lower than the other three quarters? Examine the yearly charts for the last ten years for yourself to try to figure out what "normal" is for MSB. Sorry, but there is no "normal" for MSB's unit price. Good luck.