S&P/TSX Capped Composite Index: What It Is and How to Invest

If you’ve ever looked at Canada’s stock market and wondered why a handful of banks and energy giants seem to drive everything, you’re not alone. The S&P/TSX Capped Composite Index was designed precisely to address that concentration — by limiting any single company to no more than 10% of the index.

Weight cap: 10% per constituent · Base index: S&P/TSX Composite · Number of constituents: Approximately 220 · Currency: CAD · Rebalancing frequency: Quarterly · Inception date: May 2000

What Is the S&P/TSX Capped Composite Index?

The S&P/TSX Capped Composite is a market-capitalization-weighted index that tracks roughly 220 companies listed on the Toronto Stock Exchange. Its defining feature: every constituent is capped at a 10% weight, preventing any one stock from overwhelming the index. The cap is enforced through quarterly rebalancing in March, June, September, and December.

What is the S&P/TSX Capped Financial Index?

The S&P/TSX Capped Financial Index applies the same 10% cap but restricts its universe to financial stocks within the TSX Composite. It excludes energy, materials, and other sectors, offering a purer play on Canadian banks, insurers, and financial services firms. Both indices serve different diversification goals: the broad Capped Composite spreads risk across sectors, while the Financial variant stays concentrated in one.

How Is the S&P/TSX Capped Composite Different from the S&P/TSX Composite?

The uncapped S&P/TSX Composite has no single-stock weight limit. In practice, that means Royal Bank of Canada or Shopify can exceed 10% when their stocks rally, skewing the index toward one company or sector. The Capped version rebalances quarterly to trim any overweight positions back to 10%.

Six key differences, one pattern: the capped index trades pure market motion for controlled diversification.

The pattern is clear: the cap narrows the spread between sectors, limiting any single part of the market from dictating returns.

What Does ‘Capped’ Mean in an Index?

A capped index imposes a maximum weight on any single constituent. For the S&P/TSX Capped Composite, that limit is 10%. This prevents any one company from dominating the index’s performance.

“The S&P/TSX Capped Composite imposes capped weights of 10% on all of the constituents included in the S&P/TSX Composite.” — S&P Dow Jones Indices

The 10% cap is a regulatory and diversification safeguard. It ensures that a single stock’s rally does not artificially inflate the index, and a single stock’s collapse does not devastate it. The cap is reviewed quarterly and adjusted when necessary.

What ETFs Track the S&P/TSX Capped Composite?

Two major ETFs track the S&P/TSX Capped Composite: iShares Core S&P/TSX Capped Composite Index ETF (XIC) and BMO S&P/TSX Capped Composite Index ETF (ZCN). Both offer low-cost, broad exposure to the Canadian equity market.

“Seeks long-term capital growth by replicating the performance of the S&P/TSX Capped Composite Index, net of expenses.” — BlackRock (iShares)

These ETFs are popular among Canadian investors for their simplicity and diversification.

How to Invest in the S&P/TSX Capped Composite

Investors cannot buy the index directly; they must purchase ETFs or mutual funds that track it. Follow these steps:

1. Open a brokerage account with a Canadian online broker.
2. Deposit funds into the account.
3. Research either XIC or ZCN. Review their expense ratios, holdings, and performance.
4. Place a market or limit order for the desired number of shares.
5. Review your portfolio periodically, especially around rebalancing dates.
6. Consider reinvesting dividends automatically for compound growth.

These steps offer a straightforward path to owning a piece of Canada’s broadest equity benchmark.