On a day when miners, banks and consumer names dragged the index lower, specialist insurer Hiscox (LSE:HSX) climbed after reporting a 9.5% rise in nine-month premiums and faster growth in its retail business.

Tuesday 3 November 2026 was not a good day to be long the FTSE 100. The index fell 122.90 points, or 1.14%, to close at 10,638.43, ending a run of four straight daily gains with what Reuters described as its steepest one-day fall in a month. Miners slid as copper dropped, the FTSE 350 banks index fell 1.6% ahead of the Bank of England's rate decision, and HSBC was the biggest drag in points terms.

Hiscox (LSE:HSX) went the other way. The specialist insurer's shares opened 2.8% higher at 1,935p and closed up 2.9%, according to Reuters, after it published a trading statement covering the nine months to 30 September.

The headline: premiums up 9.5%

The main figure behind the move was premium growth. Group insurance contract written premiums rose to $4,437.2m from $4,052.9m a year earlier, an increase of 9.5% on a reported basis and 8.1% at constant currency.

Written premiums represent the value of insurance policies sold during a period. They are a key measure of an insurer's growth, though not of its profitability on their own, since the eventual cost of claims on those policies may not be known for some time.

Hiscox's three main businesses contributed in different ways:

Retail:premiums up 9.1% at constant currency, with double-digit constant-currency growth in the third quarter alone; retail rates rose 1%.

London Market:premiums up 9.9% to $1,050.5m, while rates fell 5%.

Hiscox Re:gross premiums up 4.5% to $1,133.4m, while rates fell 14%.

The acceleration in retail stood out. Retail insurance typically covers smaller businesses and individuals, and it tends to be steadier than the large-risk and Reinsurance markets, where pricing can swing considerably from year to year.

Rates, discipline and the Underwriting cycle

The rate figures tell an important part of the story. In insurance, rates refer to the price charged for a given level of cover. When rates fall, as they did by 5% in London Market and 14% in Hiscox Re, insurers receive less premium for the same risk.

Insurance markets move in cycles. After periods of heavy losses, prices tend to rise as capacity becomes scarcer; when results are good and new Capital arrives, competition pushes prices down. Falling rates in the larger-risk and reinsurance lines suggest those markets are in a softer phase.

Chief executive Aki Hussain addressed this directly: "We are walking away from underpriced business." That stance reflects a common choice for underwriters in a softening market, prioritising the quality of risks written over volume, even if it means growing more slowly in some areas.

The relatively steady retail rates, up 1%, alongside double-digit third-quarter growth in that division, help explain why investors may have focused on the retail figures.

Two other elements of the statement shaped the picture.

On claims, Hiscox said a benign natural catastrophe period more than offset marine losses linked to the conflict in the Middle East. Natural catastrophes such as hurricanes and floods are among the largest sources of Volatility for property insurers and reinsurers, so a quiet period can be significant for results.

The Investment side was weaker. Hiscox reported an investment result of $104.2m, a 1.2% return, compared with $350.8m, or 4.2%, a year earlier. Insurers hold large pools of money between collecting premiums and paying claims, and the returns on those funds can make a substantial difference to profits. The company said its reinvestment yield, the rate at which it can invest new or maturing money, was 5.1%. In general terms, a reinvestment Yield above the return achieved during the period indicates that new money can be put to work at higher rates than the portfolio earned overall, although investment results also depend on market movements in the Assets already held.

Buybacks and index membership

Hiscox is also returning capital. Its $300m share buyback, announced on 25 February, was 81% complete, with 10.3m shares bought for about $241.9m.

For illustration, dividing $241.9m by 10.3m shares gives an average of roughly $23.49 per share repurchased. That figure is a simple calculation from the reported totals, rounded, and does not reflect the price paid on any particular day.

The company has been a member of the FTSE 100 since 23 September 2024. The index is reviewed quarterly by FTSE Russell, and the next review uses market-capitalisation data from Tuesday 1 December, with results announced on Wednesday 2 December after the UK close and changes effective from Monday 21 December. Recent reshuffles have shown that membership can change; in October, for example, Balfour Beatty replaced Schroders and WPP replaced Beazley.

Tuesday's gain also showed how a Business whose drivers differ from the wider market's can move independently of it. While oil, copper and interest-rate expectations moved miners and banks, Hiscox's shares responded mainly to its own premium and underwriting news.

Key dates to watch

Thu 5 Nov:Bank of England MPC decision, with a 25bp rise to 4% widely expected; M&G also publishes its Q3 update the same day.

Fri 6 Nov:US October jobs report, relevant to dollar earners; Hiscox reports its premiums in dollars.

Tue 1 Dec:FTSE Russell December review market-cap data cut-off.

Wed 2 Dec:December review announcement, after the UK close.

Mon 21 Dec:December review changes take effect at the open.

The bottom line

Hiscox's 2.9% rise on a down day for the FTSE 100 rested on a combination of solid premium growth, an acceleration in its retail division and a quiet catastrophe period that more than offset Middle East-related marine losses. Against that, rates are falling in its London Market and reinsurance businesses, and investment returns were well below last year's.

Management's stated willingness to step back from underpriced business suggests it is prioritising Margin over Volume as larger-risk markets soften. How that balance plays out, and whether retail momentum continues, will be among the threads worth following as the insurer completes its buyback and the market moves through the next round of results and index reviews.