Based on recent TSX 60 performance trends, sector moves, and major market declines during the May 15 yield/inflation selloff, the following large-cap TSX names were among the weakest performers over roughly the past 10 trading days.

Rank	Stock	Approx. 10-Day Trend	Primary Reason
1	Shopify Inc. (SHOP.TO)	Sharp decline / volatile	Weak guidance + rising bond yields + AI valuation concerns
2	Aritzia Inc. (ATZ.TO)	Significant decline	Consumer discretionary weakness + rate fears
3	Canadian Natural Resources Limited (CNQ.TO)	Weakness	Oil-price volatility + profit taking
4	Suncor Energy Inc. (SU.TO)	Moderate decline	Oil volatility + inflation concerns
5	Magna International Inc. (MG.TO)	High volatility	Auto-cycle fears + tariff concerns
6	Kinaxis Inc. (KXS.TO)	Weakness	SaaS valuation compression + yield sensitivity
7	Canadian Tire Corporation Limited (CTC.A.TO)	Sharp drop then rebound	Consumer-spending fears
8	Barrick Mining Corporation (ABX.TO)	Decline	Gold-price weakness + falling metals
9	First Quantum Minerals Ltd. (FM.TO)	Significant weakness	Copper-price decline
10	Open Text Corporation (OTEX.TO)	Moderate decline	Technology-sector pressure

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Main Themes Behind the Declines

1. Rising Bond Yields

The May 15 bond-market selloff was one of the largest drivers of TSX weakness. Higher yields pressured:

• technology,
• consumer discretionary,
• SaaS/software valuations.

Most affected:

• SHOP,
• KXS,
• OTEX.

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2. Consumer Weakness Fears

Higher:

• mortgage rates,
• debt-servicing costs,
• inflation expectations,
  hurt discretionary retail names.

Most affected:

• Aritzia,
• Canadian Tire,
• other TTCD-related stocks.

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3. Gold & Copper Price Declines

Materials stocks weakened sharply as:

• gold fell ~2.4%,
• copper fell nearly 5%
  during the May 15 macro selloff.

Most affected:

• Barrick,
• First Quantum,
• mining shares broadly.

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4. Technology Valuation Compression

TSX technology stocks sold off aggressively after:

• rising yields,
• AI valuation concerns,
• risk-off sentiment.

Shopify was particularly impacted after disappointing forward guidance earlier in May.

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Important Context

Several of these stocks:

• initially declined sharply,
  then
• partially recovered after May 16 as:
  • yields stabilized,
  • oil fears eased,
  • markets rotated back into risk assets.

So:
some names remain down materially,
while others recovered part of the decline.

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Sector Breakdown of Weakest Areas

Sector	Main Pressure
Technology	Bond yields + AI valuation
Consumer Discretionary	Consumer-spending fears
Materials	Gold/copper decline
Energy	Oil volatility
Industrials	Tariff/recession concerns

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Key Takeaway

The largest TSX 60 declines over the past ~10 trading days were mainly concentrated in:

1. technology,
2. consumer discretionary,
3. mining/materials,
4. cyclical industrials.

The primary macro drivers were:

• rising bond yields,
• inflation fears,
• commodity volatility,
• valuation compression in growth stocks.