Interactive Brokers Group Inc (IBKR)

Rating: HOLD

HOLD (5-tier) · mature cash generator · conviction: medium

EPS basis for the forward P/E and all scenario multiples: consensus forward EPS (broker-adjusted, non-GAAP).

Methodology: Valuation triangulated across five independent anchors — Monte Carlo (Student-t + regime switching), an independent DCF, peer re-rating, a sum-of-parts, and a scenario-weighted PWEV. Figures reconciled to Alpha Vantage 2026-06-27. Each chart below sits with the part of the thesis it evidences.

General research for a skeptical institutional reader. Not personalised investment advice; no position sizing or trade instructions. Figures as of the analysis date; verify before acting.

Investment Committee Summary

📎 Download the full model (Excel) — DCF line items, scenarios, sensitivity, assumptions, and extended fundamentals.

Rating Bridge

Rating = HOLD because:

• Probability-weighted scenario value implies -9% vs spot
• Monte Carlo median implies -14% vs spot
• DCF fair value implies -1% vs spot — but this is terminal-value sensitive (exit-multiple $94 vs Gordon $69, 26% apart), so it carries less weight
• Bear case (Structural — Zero-Commission / Rate / Competition Reset) downside is -62% vs spot
• Net: reward/risk of 0.2× is not asymmetric enough for a Buy and not impaired enough for a Sell — hence Hold.

Investment Thesis

At $87.04 on 27 June 2026, IBKR trades near 35x forward earnings against a segment-implied ~37x — a multiple that assumes the account-gathering engine and net interest on the cash sweep keep compounding at a mid-teens clip. The market is paying a growth-broker premium, not a broker-dealer average; peers MS, GS and SCHW sit at 14–19x. The engine's mid-cycle path lands at a $92.83 base target on ~$2.64 EPS at the guided 0.83 pre-tax margin, only modestly above spot. The DCF anchor ($94.64) and the probability-weighted $89.54 both sit close to the current price, which is why the rating is HOLD rather than a directional call: the base case is roughly discounted, and the upside scenarios require sustained double-digit account growth plus a still-supportive rate backdrop to justify the premium. The 90% multiple-driven variance in the Monte Carlo is the tell — the position is a bet on the multiple, not on near-term earnings. The single most damaging risk is a rate-and-pricing reset that compresses net interest income and the multiple at once.

The dashboard below is the whole argument on one page: spot ($95) against each valuation anchor, the scenario tree, technicals and the options-implied move.

Anti-Thesis (The Real Bear Case)

The highest-probability bear is the base case failing to earn its multiple. IBKR's premium rests on two cyclical tailwinds — elevated net interest income on segregated client cash and buoyant trading volumes — that both fade as rates ease and activity normalises. Strip the rate tailwind and net interest income, the largest earnings line, contracts; strip volume and DARTs fall. Earnings need not collapse for the thesis to break: a de-rate from ~35x toward the 14–19x peer band, on a merely flat earnings base, takes the stock well below spot without any structural impairment. The market is capitalising a mid-cycle peak as if it were the run-rate.

Key Debate

P/E Multiple explains 91% of Monte Carlo outcome variance — i.e. value is set by the multiple the market will pay, a rate/sentiment regime bet as much as an earnings bet.

Earnings-Call Disconfirmation & Sentiment

Derived signals from the MCH market-data store (Alpha Vantage transcripts + news). Quantitative tone only — a disconfirmation flag, not a substitute for reading the call.

Management vs analyst tone (2026Q1): management +0.22 vs analyst floor +0.02 → delta +0.20 (n=16 mgmt / 12 Q&A; 13th pctile across the S&P book, z -1.1).

Flag: CANDID — management unusually candid/cautious vs peers (relatively low spin).

News (last 365d, 188 articles): avg ticker sentiment +0.16 (bullish 28% / bearish 3%)

Scenario Analysis

The tree runs from a structural 'Structural — Zero-Commission / Rate / Competition Reset' downside ($36) to a 'Bull — Re-Rate' bull case ($153); the probability-weighted blend (PWEV $86) is -9% versus spot.

Scenario rationale — what each probability buys (the driver path behind every target):

• Structural — Zero-Commission / Rate / Competition Reset (20%, $36). Structural impairment — zero-commission / rate / competition reset: earnings AND the multiple compress together. Target sits below the 52-week low by construction. Drivers — implied_target: 39.4; probability: 0.2.
• Market-Activity Recession (17%, $60). Cyclical downturn — client assets + trading / IB activity + net interest on cash sweep weakens for 1–2 years before normalising. Drivers — implied_target: 66.9; probability: 0.17.
• Base — Client Assets + NII + Trading (35%, $93). Mid-cycle — normalised client assets + trading / IB activity + net interest on cash sweep; disciplined capital allocation; steady returns. Drivers — implied_target: 92.92; probability: 0.35.
• Growth — Asset Gathering / Rate Tailwind (20%, $120). Upside — asset gathering + rate tailwind lifts earnings above mid-cycle; the multiple expands modestly. Drivers — implied_target: 125.45; probability: 0.2.
• Bull — Re-Rate (8%, $153). Upside tail — sustained tight conditions or a structural re-rate on asset gathering + rate tailwind. Drivers — implied_target: 158.43; probability: 0.08.

Valuation Triangulation

Five anchors — but read them with their basis in mind. The Monte Carlo, the DCF terminal, and the peer re-rate all key off a market multiple, so they are not fully independent; only the discounted cash flows themselves are genuinely multiple-free. The discipline is to read the spread and weight the cash-based view, not to treat five numbers as five independent votes.

Peer EV/Revenue re-rate — 0% weight: it duplicates the peer-multiple information already carried by the Peer P/E anchor while ignoring margin mix; weighting both would double-count the peer view. Shown as a cross-check.

Monte Carlo — the distribution, not a point

10,000 paths, Student-t shocks (fat tails) with a regime-switching overlay. The median lands at $81 and 33% of paths finish above spot. The variance decomposition shows the p/e multiple is the dominant swing factor (91% of variance). Value is a multiple bet: fundamentals move the answer far less than the rating does.

DCF — the cash-flow anchor

Independent of the market multiple: a 5-year path, WACC 9.0%, 30x terminal FCF multiple → $94. This anchor is deliberately the heaviest (41%): it is the valuation least hostage to the current multiple regime.

Peer benchmarking — relative value

Against the peer cohort, re-rating to the peer-median forward multiple (P/E 18.42x) implies $45. A premium is only justified by superior growth/margins; otherwise it is multiple risk. Weighted just 12% so the market's mood does not drive the fair value.

Across all anchors the spread is 60% of the median — wide (genuine disagreement — the blend carries low valuation confidence).

Revenue-Segment Breakdown

The company-specific drivers behind the valuation — each segment carries its own growth, margin, multiple and capex intensity. (Tags: FACT reported · ESTIMATE from disclosures · INFERENCE judgment.)

Named Exposures

Demand & pricing cycle (FACT/ESTIMATE)

Capital intensity & shareholder returns (ESTIMATE)

Structural risk vs optionality (INFERENCE)

Industry Context — Financials — Capital Markets

This name sits in the Financials — Capital Markets as a broker_dealer. client assets + trading / IB activity + net interest on cash sweep Its scenarios are not guessed in isolation — they inherit a single, shared view of the cluster's driver cycle, so the names that depend on the same event are mutually consistent.

Value chain: SCHW (broker_dealer) · IBKR (broker_dealer) · RJF (broker_dealer)

Mapping note: name-level 'Structural — Zero-Commission / Rate / Competition Reset' (20%) + 'Market-Activity Recession' (17%) map to cluster Market-Activity Recession / Rate Reset (37%); name-level 'Growth — Asset Gathering / Rate Tailwind' (20%) + 'Bull — Re-Rate' (8%) map to cluster Upside — Asset Gathering / Rate Tailwind (28%) — the cluster row is the SUM of the mapped scenario probabilities, not a different estimate.

On the cluster's key downside — Market-Activity Recession / Rate Reset () — this name implies 37% vs the cluster house view of 37% (in line with the house). The cluster's full cross-stock reconciliation governs that the names which ride the same capex cycle assign it comparable odds.

Structure: Shared State — The fin_capital_markets cycle is the shared macro driver. Driver — client assets + trading/IB activity + net interest on cash sweep Dispersion — Members differ by cyclicality (quality compounders vs deep cyclicals).

Model Appendix

DCF — line items

FCF is bridged: NOPAT + D&A − Capex − ΔNWC (capex intensity 2% of revenue, weighted from the segments) — not a single conversion fudge.

WACC 9.0% · Σ PV(FCF) $16B + PV(terminal) $90B = EV $105B; + net cash → equity $164B ÷ diluted shares 1.75B = $94/share (exit-multiple terminal).

• Gordon (perpetuity-growth) terminal at 2.5% → $69/share — a genuinely non-multiple, cash-based cross-check; the exit-multiple and Gordon values bracket the terminal-value risk.
• Incremental ROIC on the forecast capex ≈ 172% vs WACC 9% → above WACC — the build is value-creative.

Peer set

Peer-median fwd P/E → $45; EV/Rev → $61.

Weighted fair-value math

Sensitivity

DCF/share — WACC × terminal multiple

DCF/share — revenue CAGR Δ × op-margin Δ

Tornado — DCF/share swing by driver (widest first)

Company lever — SoP/share vs Brokerage & Capital Markets multiple (AI re-rating) (base 37x)

Consensus & Market Expectations

_Consensus figures: Alpha Vantage sell-side aggregates. Where the house view sits materially above or below the street, the divergence is itself a datum — see the thesis.

Balance Sheet & Liquidity

Balance-sheet data as of 2025-12-31 (Alpha Vantage).

Capital Allocation

Free-Cash-Flow Quality

Accounting quality: SBC 1.8% of revenue; cash conversion (OCF/NI) 363% — cash-backed.

Catalyst Calendar

• 2026-07-21 (~13d) — Quarterly earnings — est. EPS $0.58 (AV EARNINGS_CALENDAR)
• 2026-10-20 (~104d) — Potential further stock split / index-inclusion mechanics follow-through (authored)
• 2026-12-01 (~146d) — Crypto / prediction-market / new-product platform expansion milestones (authored)
• 2027-03-15 (~250d) — Fed rate-path decision cycle materially re-prices cash-sweep NII (authored)

Forecast Track Record

• EPS surprise: beat 62.5% of the last 8 quarters; average surprise +4.1%.

Competitive Moat

Narrow moat. IBKR's edge is a low-cost, automated technology stack and a global regulatory footprint that lets it undercut peers while earning high margins on cash-sweep NII; but the switching costs are modest and commissions are structurally deflating, so the moat is narrow. FALSIFIABLE: if net-new-account growth decelerates below ~10% for two consecutive years while price competition compresses per-account revenue, the ~37x segment multiple is unjustified and the terminal should compress toward the diversified-broker average (SCHW/MS/GS at 14-19x).

Moat sources:

• Structurally lowest-cost automated execution and margin-lending platform (unit-cost advantage, FACT)
• Global multi-jurisdiction regulatory licences as an entry barrier for a single unified account (FACT)
• Net-interest float on ~$100bn+ client cash as a rate-geared earnings engine, not a durable moat (INFERENCE)
• Absence of high switching costs / lock-in vs. SCHW, Fidelity, Robinhood (INFERENCE)

Regulatory & Legal Risk

Probabilities and sensitivities are analyst estimates, not market-implied.

Scenario Macro & Key Risks

What the Market Is Pricing In

At the current price, the market pays 32.6× forward EPS, vs the house DCF terminal 30.0×, and a peer median 18.42×. The house DCF sits 1% below spot, so the market is pricing in more than the house case — roughly 0.2pp of revenue CAGR.

Variant perception: the house view is in-line with consensus, and the thesis is primarily FCF-driven.

Peer Quality & Weighting

Quality-weighted forward P/E: 31.0× (simple median 18.42×). Direct peers count 100%, segment 50%, broad 25%.

Historical-range cross-check: 52-week range $53–$98, centre $72 (-24% vs spot); spot sits at the 93th percentile of the range. Low-weight mean-reversion cross-check, not a fundamental anchor.

Risk / Reward & Margin of Safety

Reward/risk compares triangulated upside against the probability-weighted bear target, not the extreme tail. Bull case (Bull — Re-Rate): $153.

Assumption Register

Sensitivity-ranked drivers (widest fair-value swing first): Revenue CAGR ±3pp (16.0); Terminal × ±15% (15.0); WACC ±1pp (5.0); Op margin ±3pp (5.0); Capex intensity ±15% (1.0).

Inputs, Sources & Confidence

Every load-bearing input, labelled by type and confidence. (reported fact · company guidance · consensus estimate · market data · house estimate · inference.)

Source Log

Citation coverage: 13/14 mandated claims sourced. Filing URLs are not available via the market-data provider; company statements are cited as 10-K/10-Q via Alpha Vantage.

Load-Bearing Assumptions

DCF: WACC 9%, terminal multiple 30×, FY+5 revenue $9B. Triangulation leans 41% on DCF, 29% on PWEV.

Reasons the Thesis Could Fail (Falsifiable)

Pre-registered signals that would break the thesis — each polices a specific scenario boundary and is checked at every earnings update:

• Total DARTs (daily average revenue trades), YoY < -8% (2 consecutive prints → fin_capital_markets — Market-Activity Recession / Rate Reset). A sustained double-digit decline in transaction volume moves the base case toward the Market-Activity Recession path where growth turns negative; the threshold sits between the base and recession volume proxies.
• Net interest income, YoY < -10% (2 consecutive prints → fin_capital_markets — rate-reset transmission). NII on segregated client cash is the largest single earnings line; a sharp decline signals the rate tailwind reversing, pulling op margin toward the recession scenario's 0.75.
• Pre-tax profit margin < 0.72 (2 consecutive prints → fin_capital_markets — competition / pricing reset). The guided base margin is ~0.83; a drop below 0.72 (midpoint of base and the structural 0.68) would confirm pricing or cost pressure consistent with the structural-impairment path.
• Net new accounts, YoY growth < 10% (2 consecutive prints → fin_capital_markets — asset-gathering engine). Account growth is the structural driver behind the growth and bull paths; a deceleration below 10% removes the asset-gathering optionality embedded in the above-base scenarios.
• Regulatory / commission structure change (e.g. PFOF ban, mandated fee reset) == enacted (single event → fin_capital_markets — zero-commission / competition reset). A discrete rule change to order-flow economics or a mandated commission reset is the direct trigger for the structural scenario in which earnings and the multiple compress together.

Fact / Inference / Speculation

• FACT: Spot $95; 52-week range $53–$98; engine rating HOLD; base-case target $90 (-5%). (source: Alpha Vantage 2026-06-27, 8 July 2026)
• INFERENCE: Triangulated FV $83 (-12% vs spot · triangulated FV); the rating tracks the Monte-Carlo + scenario-PWEV core; the cash-flow anchor sits above the multiple-discipline core.
• SPECULATION: At current prices the embedded bet is that the market keeps paying the current multiple through the capex cycle — a regime call the engine cannot verify from fundamentals alone.

Recommendation: HOLD

Balanced: triangulated fair value $83 (-12% vs spot); the outcome hinges on P/E Multiple. The debate is P/E Multiple — fundamentally a multiple/regime call.

Disclosures & Limitations

This report is for informational and research purposes only. It is not personalised investment advice and does not consider any investor's objectives, financial situation, risk tolerance, tax position, or liquidity needs.

• No suitability assessment has been performed for any individual.
• Market data may be delayed or inaccurate; figures are as of the analysis date.
• Model outputs (fair values, targets, scenario probabilities) are estimates and may be wrong.
• Forecasts are uncertain; past performance is not indicative of future returns.
• The author or publisher may hold positions in securities mentioned.
• Users should verify information against primary sources (company filings) before acting.
• Investing involves risk of loss; there is no guarantee any target price is achieved.
• Ratings follow a defined research methodology (12-month expected-return thresholds), not individual circumstances.