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White Mountains Insurance Group Ltd (WTM) — chart, structure and Closelooknet read

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Signals for this name

Every Closelooknet reading that exists for WTM, from the same nightly bakes the boards use. Research diary readings, not advice.

Weather around the name 3 macro readings: Money Temperature, Factor regime, Sovereign pressure

The weather around this name

Macro readings that apply by membership — the regime, the factor tape, the sector cell, the funding backdrop.

  • Money Temperature Composite 62/100 · S&P 500 fund at 67, bullish alignedEight instruments scored on position, momentum, volume, volatility and fragility — the regime every name trades inside. Temperature lab → 2026-09-25
  • Factor regime Momentum leading — risk appetite buildingMomentum against low volatility (SPMO / SPLV): above its 50-day trend, 99th percentile of the window, +8.4% over 20 sessions. Factor regime → 2026-09-25
  • Sovereign pressure Index 0.61 · up 0.29 over 21 sessionsG7 long-end yields, 10s30s and the slope — the funding weather for every balance sheet on this site. Sovereign pressure → 2026-09-25
How it trades on rate days beta 0.11 to TLT · on the worst bond days it held up better than the market

How it trades on rate days

How WTM has moved when long-dated Treasury yields rise — measured against TLT, the 20+ year Treasury fund.

  • Beta to long bonds, 1 year 0.11 — shows only a loose link to bond moves for every 1% move in TLT (20+ year Treasuries), White Mountains Insurance Group Ltd moved 0.11% on average · correlation 0.05 · higher than 15% of US names
  • Beta, last 3 months 0.42 more rate-sensitive lately than over the year
  • On the 10 worst bond days −0.42% on average against −0.74% for the S&P 500 the 10 sessions of the past year in which TLT fell most, i.e. long yields rose most
  • Latest of those days −0.13% TLT −1.29% that day 2026-09-24

Daily total returns from the adjusted price series; a TLT down day is a day long yields rose. Beta = the average move of the name for a 1% move in TLT. Past sensitivity, not a forecast. An investment diary, not a recommendation.

Who it is priced against Insurance - Property & Casualty · United States · 8 names with week and year-to-date

Peer group

Insurance - Property & Casualty · United States

This name carries no Closelooknet score, so its cohort ranks on trend state — distance to the 50- and 200-day averages — never on a score it does not have.

Compared against WTM on the nightly bakes; the Peers tab ranks the cohort on the Closelooknet scores where it exists.

Company snapshot — White Mountains Insurance Group Ltd

WTM in five paragraphs: what it makes and sells, where it sits in the Closelooknet stack, who it is priced against, why we track it, what we watch. Research diary, not advice.

What it does
White Mountains Insurance Group is a holding company that owns a set of insurance and reinsurance businesses rather than writing all the risk itself. Its units cover property cover, specialty lines such as aviation, cyber and marine risk, casualty lines, and accident and health cover, sold through brokers and managing general agents. A separate unit reinsures municipal bond guarantees, another runs an asset-management stake called Kudu, and a smaller arm does specialty electrical contracting. It is based in Hamilton, Bermuda, and trades in the United States.
Where it sits in the stack
White Mountains carries no seat in Rubin, our AI infrastructure index. It sits in the insurance sleeve of our wider coverage, grouped by industry rather than by AI layer, as a company whose underwriting and asset-management businesses do not sit inside the AI build-out stack.
Who it is priced against
Closelooknet has not assigned a peer group to White Mountains. The market sometimes compares it with Markel, another insurance holding company built through niche underwriting and permanent capital.
Why Closelooknet tracks it
It holds a seat in the Russell 1000 but not in Rubin or Halo, our other indices, and carries no Closelooknet score yet. It has not appeared in the diary's editions or quotes so far.
What the diary watches
The diary watches how the mix between the underwriting segments and the newer asset-management and specialty-service units, such as Kudu, shifts the group's overall returns over time.

White Mountains Insurance Group Ltd (WTM) trades on US exchanges.

Written from the company’s public profile and Closelooknet’s own readings, 2026-09-17. Descriptive, refreshed with the registry; corrections welcome via the imprint. closelook.net is an investment research diary — market structure, index membership and scores are our own readings, not investment advice. Related: index compare · sector dispersion · scanner.

FAQ · from the current data · as of 2026-09-26

Quick answers

What is White Mountains Insurance Group Ltd (WTM)?

White Mountains Insurance Group Ltd trades as WTM on the US exchange (United States) in the Closelooknet research universe, as of the registry build of 2026-09-26.

Is WTM in a Closelooknet index?

Not currently — White Mountains Insurance Group Ltd is tracked in the Closelooknet research universe but is not a constituent of a Closelooknet functional index as of 2026-09-26.

Where does WTM trade against its moving averages?

Mixed moving-average stack: Trades -4.1% vs the 50-day and -4.7% vs the 200-day average, 13% below the 52-week high and +23.2% off the 52-week low; a death cross printed 6 sessions ago. Computed from daily closes. As of 2026-09-25 — a technical state from the nightly Closelooknet bake, not advice. The Technical tab carries the full row.

How does White Mountains Insurance Group Ltd trade when bond yields rise?

Over the past year White Mountains Insurance Group Ltd had a beta of 0.11 to TLT, the long-dated Treasury fund — it shows only a loose link to bond moves, higher than 15% of US names. On the 10 sessions in which long bonds fell most it moved −0.42% on average, against −0.74% for the S&P 500. The "How it trades on rate days" block on this page carries the lines.

What does White Mountains Insurance Group Ltd do?

White Mountains Insurance Group is a holding company that owns a set of insurance and reinsurance businesses rather than writing all the risk itself. Its units cover property cover, specialty lines such as aviation, cyber and marine risk, casualty lines, and accident and health cover, sold through brokers and managing general agents. A separate unit reinsures municipal bond guarantees, another runs an asset-management stake called Kudu, and a smaller arm does specialty electrical contracting. Closelooknet has not assigned a peer group to White Mountains. The market sometimes compares it with Markel, another insurance holding company built through niche underwriting and permanent capital.

Where does White Mountains Insurance Group Ltd sit in the AI build-out?

White Mountains carries no seat in Rubin, our AI infrastructure index. It sits in the insurance sleeve of our wider coverage, grouped by industry rather than by AI layer, as a company whose underwriting and asset-management businesses do not sit inside the AI build-out stack. It holds a seat in the Russell 1000 but not in Rubin or Halo, our other indices, and carries no Closelooknet score yet. It has not appeared in the diary's editions or quotes so far.

What does this page show?

A live price chart with SMA overlays and drawing tools for WTM, performance metrics, index-membership context and the Closelooknet structure read — an investment research diary view, not investment advice.

Related in the Closelooknet universe

then Insurance - Property & Casualty, then Financial Services. Scored names rank on their Closelooknet score; names without one rank on trend state — above or below their 50- and 200-day averages — never on a score they do not carry.