The Collaborative International Dictionary of English v.0.48:
long-dated \long-dated\ adj. (Finance) of a gilt-edged security: having more than 15 years to run before redemption. [British] [WordNet 1.5]WordNet (r) 3.0 (2006):
long-dated adj 1: of a gilt-edged security; having more than 15 years to run before redemption