Duh! Altgas's move has nothing to do with interest rates (although they have fallen again today, now down 65 basis points in last 12 months, US ten year). All has to do with valuation, and if they hit there numbers as presented in last investor presenation, Altagas is deep discount to peers!
Look at Artis Reit, cut their divi, market over reacted, sold it down to 8.80 in late december, has a NAV of 15 ish. Company buying back shares at about 2 million a month. Of course the unit price is going to rise.