Debt ceiling discussions are heating up as the X-date looms.

Shares of Virax, the U.K.-based provider of diagnostic tests and PPE, including test kits for COVID-19, as much as quadrupled in value in their debut session following the company's IPO. Virax Biolabs ended the week at $10.34.

Shares of Ivanhoe Electric fell as much as 8.1% in their trading debut after the minerals exploration company raised $169 million via its IPO, the biggest initial public offering in the U.S. since May.