Spot bitcoin ETFs have notched trading volumes of roughly $10 billion in their first three days on the market, with funds by Grayscale Investments and BlackRock continuing to lead competitors in that category.

Grayscale’s newly converted Bitcoin Trust ETF (GBTC) notched Tuesday trading volumes amounting to about 25 million shares, or $970 million, a Blockworks review of Yahoo Finance data found.

That came after GBTC’s volumes were about $2.3 billion and $1.8 billion on Thursday and Friday, respectively.

Read more: Bitcoin ETF Tracker

High trading volumes for GBTC did not signify a net influx of funds. It saw net outflows of $579 million last week, as highlighted in a CoinShares…

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