TOKYO, May 29 (Reuters) - The Bank of Japan's holdings of exchange-traded funds (ETF) reaped latent profits worth 37.31 trillion yen ($237.54 billion) as of March, up from 23.58 trillion yen as of September last year, the central bank's fiscal 2023 business earnings showed on Wednesday.

Latent losses on the central bank's government bond holdings stood at 9.43 trillion yen as of March, compared with 10.5 trillion yen in September last year, the earnings showed.

($1 = 157.0700 yen) (Reporting by Leika Kihara; Editing by Christian Schmollinger)