The digital currency traded at $8,671.67 at 12:37 p.m. HK/SIN after touching as low as $8,587.05 earlier in the day, according to industry site CoinDesk.
At its current levels, bitcoin has declined around 24 percent for the week.
The cryptocurrency came under pressure earlier in the week after the U.S. Securities and Exchange Commission said exchanges that offered trading of “digital assets that are securities” would have to register with the agency.
That statement on Wednesday came after weeks of subpoenas from the SEC in its attempt to establish better control over the many trading platforms and exchanges.
Regulatory developments in the Asia Pacific region also likely put a dampener on prices this week.
Japan’s Financial Services Agency issued punishment notices to a number of exchanges in the country on Thursday, Reuters reported. Regulators also suspended operations at Bit Station and FSHO for a month, the news agency reported.
Regulatory scrutiny in the country increased after $530 million worth of virtual tokens were stolen from Coincheck, a Tokyo-based cryptocurrency exchange, earlier this year.
— CNBC’s Thomas Franck contributed to this report.