However, Riyadh dismissed threats of sanctions over the disappearance of Khashoggi and vowed Saudi Arabia would retaliate against any such action. Saudi officials assert - without providing proof - that he left the embassy, but Turkish officials believe he may have been murdered by Saudi agents in an elaborate kill job.
The country's main stock market index in Riyadh - the Tadawul - fell as much as 7 percent at one stage as billions of dollars were wiped off the value of leading Saudi companies.
According to a prince belonging to Saudi Royal family, 5 members of the Royal family who raised voice against the disappearance of Jamal Khashoggi have been put in jail.
Republican Sen. Marco Rubio of Florida says that the U.S. -Saudi relationship should be "completely revised" if the Saudi government killed Jamal Khashoggi, the prominent Saudi journalist who has been missing since entering a Saudi consulate in Istanbul several weeks ago.
Saudi Arabia is the world's top oil exporter, and Kudlow was asked on "Fox News Sunday" whether a Saudi response could affect energy prices.
The Foreign Ministers of the United Kingdom, France and Germany on Sunday expressed serious concerns about the fate of a missing Saudi Arabian journalist and called for an investigation into the case.
They released a statement earlier on Sunday which read, "The Kingdom affirms its total rejection of any threats and attempts to undermine it, whether by threatening to impose economic sanctions, using political pressures, or repeating false accusations that will not undermine the Kingdom and its staunch positions and Arab, Islamic and worldwide status, the outcome of these weak endeavors, like their predecessors, is a demise". "The Saudi economy has vital and influential roles for the global economy".
Turkish President Tayyip Erdogan gestures as he speaks at a business conference in Budapest, Hungary, October 9, 2018.
Already, global business leaders are pulling out of the kingdom's upcoming investment forum, a high-profile event known as "Davos in the Desert", and the sell-off on Riyadh's Tadawul stock exchange showed that investors are uneasy.
Turkish officials fear he was killed and dismembered. "I don't think any of our government officials should be going and pretending it's business as usual until we know what's happening".
Foreign capital is key to Saudi Arabia's plans to diversify its economy beyond oil and cut a 12.9% jobless rate among its citizens. Until the issue of Khashoggi is cleared up Branson said that any discussions over the Virgin Galactic and Virgin Orbit investment would be suspended.