In recent trading sessions, U.S. bitcoin exchange-traded funds (ETFs) have continued to attract investment, with total inflows reaching approximately $50 million. Blackrock's IBIT led the gains, while Grayscale's GBTC and Vaneck's HODL reported outflows.

During Friday's trading, the total volume of transactions for bitcoin ETFs reached $1.73 billion. Among the ETFs, Blackrock's IBIT received the largest share of inflows, contributing significantly to the total $50 million increase. Meanwhile, Grayscale's GBTC and Vaneck's HODL saw reductions in their holdings, with GBTC's outflows being more substantial than HODL's.

As of the latest update, Grayscale's GBTC now holds 286,957.14 BTC, following a divestment of 485.89 BTC since Wednesday. In contrast, Blackrock's IBIT increased its holdings to 289,058.01 BTC with inflows recorded on Thursday and Friday. Fidelity's FBTC also saw growth in its BTC holdings, rising from 162,303.38 BTC to 164,030.47 BTC.

Ark Invest's ARKB and Bitwise's BITB experienced some divestment during the week, with ARKB now holding 47,175 BTC and BITB holding 36,770.61 BTC as of June 1, 2024. Overall, the major BTC funds combined hold a total of 823,991.23 BTC, valued at approximately $55.82 billion.

Apart from these movements, most other funds reported neutral activity with no significant inflows or outflows. Vaneck's HODL, however, recorded slight divestment during Friday's trading session.

In conclusion, while U.S. bitcoin ETFs continue to attract investments, particularly into funds like IBIT, others such as GBTC and HODL have experienced reductions in their BTC holdings. This dynamic reflects ongoing shifts in investor sentiment and strategies within the cryptocurrency market.