The extra compensation investors demand to hold long-dated government bonds is likely to remain elevated barring an unexpected economic downturn, presenting opportunities to buy at higher yields, according to Pacific Investment Management Co. The 30-year [ADDRESS] yield has risen to levels not seen in almost two decades, as underperformance at the long end steepened the yield curve and pushed up the term premium. Pimco said long-term yields in [ADDRESS], the [ADDRESS] and [ADDRESS] have also climbed.