According to regulatory filings published on Wednesday, the investment giant BlackRock has “begun to dabble” in the bitcoin market.

The fund manager had $6.5 million in CME bitcoin futures contracts earlier this year, according to a source familiar with the situation. According to published documents, those contracts had earned $360,457 on reporting day.

On reporting day, Jan. 31, the assets accounted for 0.03 percent of BlackRock’s vast Global Allocation Fund – “very small,” according to the source. (The increases are just 0.0014 percent.) On March 26, BlackRock’s initial 37 contracts came to an end.