According to CIMB Islamic Bank CEO Rafe Haneef, Muslim countries and customers with such affinity should tap into the green sukuk market, given the estimated US$45 trillion demand for such assets. He added that green sukuk, was very much part and parcel of shariah compliance, which should be halal and sustainable. In the context of global sukuk, the total size per year is about US$45 billion to US$50 billion, so green bonds are already five times the size of sukuk. RAM Rating Services deputy CEO Promod Dass said there was US$3 trillion worth of green investment needs in Asean from 2015 to 2030. Maybank Group global banking head Datuk Muzaffar Hisham opined Malaysia was in the right direction of participating in the green sukuk sector. He added that appetite for green investment was growing, the only question remaining was how to accelerate it.