Silicon Valley is bracing for what it fears will be an "extinction event" threatening the survival of hundreds of startups. Tom Loverro, a investor at 40-year-old Bay Area venture capital firm IVP, has been loudly warning for months on Twitter and in media interviews about a coming "mass extinction event" for startups. The total volume of venture capital investment into US startups has slumped for six consecutive quarters, according to data firm Pitchbook. Even a last-ditch slashing of the startup's prospective valuation — a "down-round," in Silicon Valley parlance — didn't whet investors' appetites. Over the past year, many startups that rely on Silicon Valley funding have been steeling themselves for the slowdown to avoid similar fates.

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Persons: —, they're, Jennifer Neundorfer, That's, Tom Loverro, Loverro, Consuelo Vanderbilt, Vanderbilt, Cameron Lester, I've, Lester, Linda Ahrens, Ahrens, Unown, " Ahrens, Anna Dittrich, Plastiq, Vincent Harrison, Elad Gil, Steve Brotman, Brotman, Will Hawthorne, VC's, Mike Ryan, Pitchbook's Harrison, Sell, Hawthorne Organizations: Ventures, Sequoia Capital, —, Venture, Twitter, United States Federal Reserve, Jefferies, January Ventures, Alpha Partners, Avid Capital, Sugar, Menlo, BulletPoint Network Locations: Silicon, Sequoia, IVP, Valley, Instacart, Navan, Boston, Snowflake, America