X0102 24F-2NT LIVE 0000820892 XXXXXXXX N-1A NUVEEN INVESTMENT FUNDS INC 333 West Wacker Drive Chicago IL X1 60606 Nuveen Real Estate Securities Fund S000005563 R6 C000126484 C C000015149 A C000015147 I C000015151 811-05309 033-16905 12/31/2025 false false S000005563 192649616.87 440938560.64 3165679352.71 3606617913.35 0 (3413968296.48) 0.0001381 0 0 0 Geoffrey Noyes MD Performance & Reporting, Fund Administration 03/31/2026 NUVEEN INVESTMENT FUNDS INC 333 West Wacker Drive Chicago IL X1 60606 Nuveen Global Infrastructure Fund S000020012 C C000070757 R6 C000171406 I C000056119 A C000056118 811-05309 033-16905 12/31/2025 false false S000020012 144447751.91 157149589.77 259435450.44 416585040.21 0 (272137288.3) 0.0001381 0 0 0 Geoffrey Noyes MD Performance & Reporting, Fund Administration 03/31/2026 NUVEEN INVESTMENT FUNDS INC 333 West Wacker Drive Chicago IL X1 60606 Nuveen Real Asset Income Fund S000033768 R6 C000171407 C C000104366 I C000104368 A C000104365 811-05309 033-16905 12/31/2025 false false S000033768 252978719.97 250054843.12 775504069.07 1025558912.19 0 (772580192.22) 0.0001381 0 0 0 Geoffrey Noyes MD Performance & Reporting, Fund Administration 03/31/2026