The phrase "a permanent interest" is correct and usable in written English.
It can be used to describe a lasting or enduring concern, passion, or investment in a particular subject or area.
Example: "Her dedication to environmental conservation reflects a permanent interest that drives her career choices."
Alternatives: "a lasting interest" or "an enduring interest".
He continued, "As propaganda for the social revolution this book should be invaluable, and it may have a permanent interest to the historians of our decay".
Health savings will go into a "medical research future fund" which will generate a permanent interest stream to fund important research.
FR Leavis seemed to prove James's point, when he excluded the Brontës from his Great Tradition, on the grounds that Charlotte's was only "a permanent interest of a minor kind" and that Wuthering Heights, though "astonishing", was "a kind of sport".
Voelcker (1893) observed that anything which induces the people to invest money on the land gives them a permanent interest in the continuance of the English rule.
Since the second order equations have applications in various problems in physics, biology, and economics, there is a permanent interest in obtaining new sufficient conditions for the oscillation or nonoscillation of solutions of various types of second order equations; see for example [1 12], and the references cited therein.
The stakeholder principle (or jus nexi) is proposed as an alternative (or a supplement) to birthright citizenship: individuals who have a "real and effective link" (Shachar 2009, 165) to the political community, or a "permanent interest in membership" (Bauböck 2008, 35) should be entitled to claim citizenship.
They can sell investors' future debt claims that work like a bond and are known as permanent interest bearing shares (PIBS) as a way of raising funds.
For example, Henry Ireton stated, "no man hath a right to an interest or share in the disposing of the affairs of the kingdom... that hath not a permanent fixed interest in this kingdom".
Forms of government are, rather, to be judged according to "utility in the largest sense, grounded on the permanent interest of man as a progressive being" (On Liberty, p. 224).
I believe if the North Korean nuclear threat can be permanently solved, and inter-Korean relations put on a stable and sustainable footing, the U.S. has no permanent interest in retaining military forces on the peninsula.
As a youth, he gave some attention to the ways of the brook fish of western Switzerland, but his permanent interest in ichthyology began with his study of an extensive collection of Brazilian fishes, mostly from the Amazon River, which had been collected in 1819 and 1820 by two eminent naturalists at Munich.
