Wall Street's fear gauge saw one of its steepest drops in history as tariff risks dissipated this week

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• Wall Street's fear gauge saw its quickest-ever decline over a 21-day period amid the trade chaos.
• Market panic rapidly gave way to optimism after the US and China agreed to dial down tariffs.
• Stocks have historically rallied higher after similar VIX declines in the past, Bespoke Investment Group told BI.

Fear on Wall Street has never dissipated so quickly.

The CBOE Volatility Index, a measure of market volatility commonly...