(EnergyAsia, March 28) — Research house MayBan Securities has placed a ‘hold’ rating on the stock of Malaysian power company Tenaga Nasional Sdn Bhd (TNB). The stock has been trading between RM7.85 and RM9.70 over the last 52 weeks. (US$1=RM3.8).             TNB recently signed a Heads of Agreement with Celcom Transmission (M) Sdn Bhd (CTX)…