BREAKING: The Dow Jones Industrial Average falls -600 points in 30 minutes as US equity markets react to new tariff threats from President Trump.

The Dow is price weighted and sensitive to sharp moves in a few large stocks.

When tariff threats resurface, markets react to uncertainty first.

Tariffs raise input costs for companies that rely on global supply chains.

They also invite retaliation from trading partners.

That combination can compress profit margins.

Investors quickly adjust expectations for earnings.

Fast selling in the first 30 minutes is often driven by algorithms.

Many trading systems respond automatically to headlines.

That can exaggerate the initial move.

The key question is whether this is positioning or policy.

If the tariff threat turns into formal action, businesses may delay investment.

If it is negotiation leverage, markets may recover once clarity emerges.

Short term volatility reflects fear of disruption.

Long term direction depends on how trade partners respond and whether inflation pressures build again.

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