Stacks of S&P/ASX 200 Index (ASX: XJO) shares tumbled to multi-year lows amid the benchmark index slumping to a six-month trough on Friday.

The ASX 200 closed at 7,948.2 points, down 1.81%.

This followed a rough session on Wall Street overnight. The S&P 500 Index (SP: .INX) fell 1.78% and the Dow Jones Industrial Average Index (DJX: .DJI) slipped 0.99%.

The Nasdaq Composite Index (NASDAQ: .IXIC) also finished well into the red, down 2.61%.

Markets were nervous on Friday as US President Donald Trump paused tariffs on some Canadian and Mexican goods less than three days after introducing them.

The US commenced a 25% tariff on imports from Canada and Mexico and an additional 10% tariff on Chinese imports on Tuesday.

All three countries vowed to respond in kind with their own tariffs on imported US goods.

Trump's inconsistency and unpredictability are creating confusion, and markets are increasingly worried that a global trade war is imminent.

A trade war would be a significant setback for the global economy and undo decades of free-trade cooperation between many Western nations.

Tariffs typically filter through to consumer prices, and this could reignite inflation and delay further interest rate cuts in advanced economies.

Many ASX 200 shares were down today, with no fewer than 16 touching new share price lows.

Let's take a look.

Which ASX 200 shares tumbled to new lows on Friday?

Fortescue Ltd (ASX: FMG)

This ASX 200 iron ore stock slid to a two-and-a-half-year low of $15.87 today.

Woodside Energy Group Ltd (ASX: WDS)

The ASX 200 energy sector's largest stock fell to a three-year low of $22.55 per share.

Santos Ltd (ASX: STO)

The energy sector's second-biggest stock also reached a multi-year low of $6 today.

IDP Education Ltd (ASX: IEL)

The IDP Education share price fell to a six-year low of $9.05 per share.

Ampol Ltd (ASX: ALD)

The Ampol share price fell to a four-year low of $24.26.

Pilbara Minerals Ltd (ASX: PLS)

ASX 200 lithium share Pilbara Minerals dipped to a three-and-a-half-year low of $1.80.

Viva Energy Group Ltd (ASX: VEA)

This ASX 200 energy share reached a five-year trough of $1.62 per share.

Reece Ltd (ASX: REH)

ASX 300 industrial share Reece dropped to a two-year low of $16.54 today.

Domino's Pizza Enterprises Ltd (ASX: DMP)

The Domino's Pizza share price tanked to a nine-year low of $26.31 per share on Friday.

Iluka Resources Ltd (ASX: ILU)

Iluka Resources shares slipped to a four-and-a-half-year low of $4.06 per share.

Magellan Financial Group (ASX: MFG)

ASX 200 financial share Magellan dropped to a 52-week low of $7.97.

Coronado Global Resources Inc (ASX: CRN)

ASX 200 coal share Coronado collapsed to a four-year low of 51 cents on Friday.

ARB Corporation Ltd (ASX: ARB)

ARB Corporation shares fell to a 52-week low of $33.55 per share on Friday.

Lovisa Holdings Ltd (ASX: LOV)

ASX 200 retail share Lovisa slipped to a 52-week low of $25.10.

Paladin Energy Ltd (ASX: PDN)

ASX 200 uranium share Paladin sank to an 18-month low of $6.34.

Polynovo Ltd (ASX: PNV)

ASX 200 healthcare share Polynovo fell to a 52-week low of $1.22 per share.