I'm not one to bursts everyone hopes but I kinda have a rough idea as to why SC would shoot down the idea. It is safe to say that all of PNB's fixed priced funds easily accounts for a large majority of the local stock market. If one is to assume that these funds make up say 1/4 of the entire market capitalization, any "run" on PNB where its investors decide to redeem their units would be catastrophic to the stock market.
Remember that these fixed priced funds are pegged at RM1 regardless of its actual NAV. Even if the NAV for these funds are MYR0.70, PNB still has to honor the RM0.30 difference by whatever means necessary, including liquidating its equity securities at fire-sale prices. This has to be done as PNB honors redemption transactions on the spot or issues a cheque for large transactions pretty much on the same day of the transaction.
If you put yourself in the SC's shoes, you can see the systemic risks that these fixed priced fund can cause in the event of a severe economic slowdown and a run on PNB. Having ASB+AS1M+ASW+ASD+ASM wipe out a large chunk of market capitalization is not only bad for the stock market but creates after-effect shocks that can shake the entire economy.
My assessment that PNB's fixed priced fund make up 1/4 of the entire market capitalization maybe on the low side. Judging how large ASB alone is, one could speculate that PNB's exposure to the local equity market might be closer to 1/3.
That's how I come to the conclusion that SC will not sanction future fixed priced funds but....
There's nothing stopping anyone from hoping and wishing there is

in 2010 PNB's fund size was rm150bil and TabungHaji -rm28bil while in 2012 EPF was rm527bil. Total KLSE size I think is rm1000bil. Not all these funds are invested in KLSE, alot of them are in Govt bonds which is why the yearly dividend is quite low but consistent. Many investors take these funds as safe-haven and only cash out when necessary cos it is easy to sell but hard to buy (esp for the non-bumi).