Market news intro

The FTSE 100 ex Investment Trusts edged lower in the latest session, closing at 3,390.67, a slip of -0.16% from the previous close of 3,396.15 according to the FT.com data sheet. It is a small move, but it is the type of move that tells a story when you know what the index is for. Strip out the closed-end investment vehicles — which behave less like operating companies and more like baskets of other Assets — and you are left with a purer reading of how Britain’s biggest businesses are actually performing on the day.

For institutional investors building benchmarks, for index-tracker designers and for technical analysts, the ex-investment-trusts variant is often the more useful number. It captures the same heavyweight commercial reality as the headline FTSE 100 without the noise that closed-end funds can sometimes inject.

What the index tracks

The FTSE 100 ex Investment Trusts contains the constituents of the standard FTSE 100 with closed-end investment trust companies removed. In the source sheet, the variant is shown with 95 constituents alongside its level, which suggests the headline FTSE 100’s 100 names minus the investment trusts that sit inside it. The result is an index of operating companies — businesses that make, sell, mine, refine, distribute, lend or insure — rather than vehicles whose own returns are produced by holding a portfolio of underlying securities.

It is calculated by FTSE Russell using the same methodology as the parent index: Capitalisation-weighted, free-float-adjusted, reviewed quarterly. It moves in the same general direction as the headline FTSE 100 but can diverge slightly when investment trusts in particular do something unusual — a discount widening, a major manager change, a corporate action.

Why investors follow it

Three groups care about this variant. The first is index-product designers, especially those creating UK income or core Equity strategies who want to avoid double-counting underlying holdings via closed-end vehicles. If you already hold a basket of UK companies, owning a trust that holds many of the same names adds layers without adding Diversification.

The second is institutional benchmarkers. Pension funds, charities and corporate treasuries that benchmark UK equity exposure sometimes prefer an ex-investment-trusts measure because it gives a cleaner read of operating-company performance and avoids any quirks that come from trust premiums and discounts.

The third is the analyst community. When commentators want to discuss what UK plc is doing this quarter — Earnings, margins, dividends, Buybacks — they often quietly flick to the ex-investment-trusts version of the index because it is more representative of corporate fundamentals.

Latest and previous index levels

The source sheet records the latest level at 3,390.67 and the previous close at 3,396.15, giving a session move of -0.16%. The index is calculated at a different scale to the headline FTSE 100, so direct point-by-point comparison is not appropriate, but the percentage move is broadly aligned with the parent index on the day. No further intraday detail is provided in the sheet beyond these reference points.

Market themes that may affect the index

Because the constituents are essentially the FTSE 100 minus a small number of investment trusts, most of the same macro themes apply. The path of UK and global rates affects valuation; sterling movements affect translated overseas earnings; the Commodity cycle affects energy and Mining heavyweights; the global rate cycle affects banks and insurers; the consumer-spending environment affects retailers and consumer staples.

What is slightly different is sensitivity to corporate-actions news. Because investment trusts are stripped out, the variant index is less affected when trust-specific factors — manager change, gating, discount widening — move particular trust prices. Conversely, when a sector wave hits closed-end funds (such as a sustained discount widening across the alternative-assets sector), the headline FTSE 100 may dip more sharply than the ex-investment-trusts version, which can therefore look modestly more resilient.

The medium-term theme that matters most is the ongoing debate about whether UK-listed operating companies are systematically undervalued relative to global peers. Ex-investment-trusts indices often feature in research that tries to compare like-for-like UK operating-company valuations against, say, the S&P 500. If London is genuinely cheap on a clean-comparison basis, this is the index variant most often cited.

Key sectors, countries and company types represented

The sector mix is dominated by the same blocs as the parent index: integrated oil and gas, mining majors, big pharmaceuticals, large international banks, defensive consumer staples (tobacco, drinks, household goods), insurance, and aerospace and defence, alongside telecoms, real estate, and a smaller cluster of technology-adjacent companies.

In terms of Revenue geography, the same internationalist character applies. A typical FTSE 100 ex Investment Trusts constituent earns substantial revenue overseas, often in dollars or euros, with end-markets across North America, Europe, Asia and emerging markets. A move in sterling is therefore a meaningful translation Factor for index earnings.

Main risks for investors

The risk profile mirrors the FTSE 100 itself. Mega-cap concentration risk is high: a handful of companies have outsized weight, so company-specific events at any of them can move the index. Sector concentration risk is also material: a sustained downturn in oil, banking, mining or pharmaceuticals would weigh on the variant.

Currency risk cuts both ways: sterling weakness flatters reported numbers, sterling strength does the opposite. Dividend risk is real: while many constituents have long records of paying, dividends are not guaranteed and can be cut or suspended in stress conditions, as the Pandemic demonstrated. Regulatory and tax risk is ever-present, particularly for utilities, energy, banking and big pharma. And, of course, broader equity-Market Risk applies — recessions, geopolitical events, sentiment shifts and Liquidity squeezes can all drag the index down sharply over short windows.

How the index compares with broader market benchmarks

Versus the headline FTSE 100, the ex-investment-trusts version is essentially a near-twin with a small but meaningful methodological cleanse. Compared with the FTSE All-Share, it is more mega-cap heavy and less exposed to mid-and-small-cap UK plc. Compared with the FTSE 250, which is more domestic in revenue mix, it is more international and more cyclical to global rather than UK Demand.

Globally, it shares the FTSE 100’s well-known character: lower price-to-earnings multiples than the S&P 500, generally higher dividend yields, less mega-cap technology weight, and more old-economy sectoral mass. Investors who think the US has run too hot have, for years, looked to indices like this one as a possible relative-value play. Investors who think the US is justified in its premium tend to view the variant as cheap-for-a-reason.

Investor takeaway

For UK investors who already own a generic FTSE 100 tracker, the ex-investment-trusts variant is unlikely to be available as a simple ETF on its own — it tends to live in institutional contracts and benchmark statements. But it remains useful for understanding what the headline index is really doing at the operating-company level. The latest reading of 3,390.67, against a previous close of 3,396.15, is a fractional move; the bigger story is that the variant continues to track the parent closely, with the strip-out of investment trusts mainly mattering at the margins.

For analytical purposes, this is the index to watch when the question is: how are Britain’s biggest operating businesses faring today? When closed-end funds are quiet, the variant moves with the parent index. When closed-end funds are loud — discounts swinging, big secondary issuance, sector-specific stress — the variant offers a cleaner read.