"unsubstantiated speculation" — Collocation dictionary inglés

Automatic translation (We do not guarantee its correctness): niepotwierdzone spekulacje
  1. unsubstantiated adjetivo + speculation sustantivo
    Very loose collocation

    Time Inc. soared 5 points, to 180, higher than Paramount Communications' $175-a-share bid, on unsubstantiated speculation of a competing bid of $215 a share.