New Zealand NZ50 - Wherefore goest thou?

The New Zealand NZ50G (gross) benchmark index versus some indicative major components: Spark telecoms SPK, Auckland International Airport AIA, and then the electricity generation utilities Meridian MEL, Contact CEN and Mercury MCY along with the NZX Utilities Index G55G - and last, but definitely not the least, is presently the largest New Zealand company Fisher & Paykel Healthcare FPH.