Published: Mar 18, 2018 8:46 p.m. ET Bitcoin down 23% this month, 40% this year The price of bitcoin swung wildly Sunday, first plunging about 7% to nearly $7,000, then rallying by $700 in the span of a few hours. Bitcoin prices

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  were last at $8,355, according to Coindesk. The plunge was apparently precipitated by a report by the U.K.’s Sky News that Twitter Inc.

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  would ban cryptocurrency ads in the coming weeks.

That would follow similar recent bans by Facebook Inc.

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  and Alphabet Inc.’s

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  Google. Twitter had no comment Sunday.

Prices Sunday bottomed out at $7,335 before recovering by late afternoon. Bitcoin is down 15% in the past seven days, and down 23% in the past month.

Year to date, bitcoin is down 40%, after peaking at an all-time high above $19,000 in late December. Still, bitcoin is up 654% over the past year.

Other cryptocurrencies fared better Sunday: ether gained 2%, Ripple jumped almost 11% and bitcoin cash rose nearly 2%. Bitcoin futures contracts fell as well Sunday, with the Cboe Global Markets April contract

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  down more than 2% and the CME Group Inc. March contract

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  down more than 7%. Read more from…

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