Jan 20 (Reuters) - Agl Energy Ltd AGL.AX
* AGL negotiates new commercial agreement with Alcoa (NYSE:AA)
* Has finalised a new four year agreement to supply electricity to Portland smelter joint venture participants' (Alcoa) aluminium smelter
* Contract is for a volume of 510mw, which is approximately equivalent of 10 percent of Victoria's total electricity load Source text for Eikon: Further company coverage: AGL.AX