NEW YORK, March 21 (Reuters) - The U.S. Securities and Exchange Commission has delayed its decisions on whether to allow the listing and trading of spot bitcoin exchange-traded funds from WisdomTree and One River, according to notices on the regulator's website.

The SEC said it would approve or disapprove a proposal to list and trade the WisdomTree Bitcoin Trust by May 15 and a proposal to list and trade the One River Carbon Neutral Bitcoin Trust by June 2. (Reporting by John McCrank Editing by Chizu Nomiyama)