Almost two years on from its launch Fidelity Investments bitcoin index fund has seen a drop in the growth of in-bound investments year on year, regulatory filings show. 

The Wise Origin Bitcoin Index Fund went public in August 2020, giving Boston-based Fidelity the ability to offer clients bitcoin exposure. Almost nine months later the fund had raised $102 million, according to SEC filings.

According to its latest SEC filing, made on Monday, the fund has now raised a total of $126.5 million as of May 23, signaling a tapering in overall growth compared to the earlier reporting period. While the fund's size has grown modestly during its second year, the number of investors has increased from 83 to 689, according to the latest filing. 

Fidelity recently announced that it will allow its …