Spot Bitcoin exchange-traded funds in the United States saw a return to inflows on Jan. 15, as Bitcoin briefly surpassed $100k following the release of U.S. December Consumer Price Index data.

According to data from SoSoValue, the 12 spot Bitcoin ETFs recorded $755.01 million in net inflows on Wednesday, breaking a four-day outflow streak during which over $1.2 billion exited the funds.

Interestingly, the majority of the inflows on the day came from Fidelity’s FBTC, which attracted $463.08 million — its highest net positive flow since March 7 of last year, when it recorded an inflow of $473.4 million. ARK and 21Shares’ ARKB followed with an inflow of $138.81 million a huge jump from the modest inflow of $2.89 million recorded the previous day.

Further, seven other BTC ETFs also contributed to the positive momentum, with none of the investment products recording any outflows on the day, as detailed below:

• Grayscale’s GBTC: $50.54 million.
• Biwise’s BITB: $32.69 million.
• BlackRock’s IBIT: $31.86 million.
• VanEck’s HODL: $16.98 million.
• Grayscale Bitcoin Minit Trust: $13.69 million.
• Invesco Galaxy’s BTCO: $4.47 million.
• Franklin Templeton’s EZBC: $2.9 million.

The total trading volume for the 12 Bitcoin ETFs was $3.18 billion on Jan. 15 significantly higher than the $2.23 billion recorded the previous trading day.

The significant inflows recorded come as Bitcoin managed to surge past $100,000 briefly to reach a daily high of $100,702 on Jan. 16, amid a broader market rally that gained 1.6% over the day, bringing the total market capitalization to $3.63 trillion.

The surge followed the release of the U.S. December Consumer Price Index report. Headline CPI rose 0.4% month-on-month, with a 2.9% annual increase, aligning with expectations. Meanwhile, Core CPI, seen as a key inflation indicator, climbed 0.2% month-on-month, while its annual rate dipped slightly to 3.2% below the anticipated 3.3% and November’s reading of 3.3%, signaling a positive trend in underlying inflation.

At press time Bitcoin (BTC) was still up 2.5% over the past day exchanging hands at $99,359 per coin.

Meanwhile, the nine Ether ETFs also recorded a surge in inflows on Jan. 15, with $59.78 million flowing into the funds compared to the modest $1.15 million recorded the previous day.

Notably, Fidelity’s FETH led the pack with an inflow of $29.32 million followed by BlackRock’s ETHA which drew in $19.85 million. More modest inflows came from Grayscale Ethereum Mini Trust which saw inflows of $8.09 million and $2.53 million respectively.

The cumulative total net inflow into these investment vehicles stood at $2.47 billion. At press time, Ethereum (ETH) was also up 4.2% over the past day trading at $3,366.