6/10 · Moderate-High — account growth +31% YoY and still accelerating, a global TAM, but a rich multiple and a rate-cut drag on net interest income cap the multibagger
Low-Moderate — only 2 net-bullish voices / 11 claims; the verdict rests on fundamentals + quant, not breadth of expert coverage
Position sizing
Satellite-quality-growth, ~2–4% weight; scale in on rate-cut weakness
Next catalyst
2026-07-21 Q2'26 earnings (Street EPS $0.59)
Single biggest risk
Falling short-term rates compress net interest income (~55% of net revenue)
One-line thesis. The lowest-cost, most-automated broker on earth is compounding accounts at +31% a year with almost no marketing spend and ~90% pretax margins — a genuine flywheel — but you are paying 39× earnings for a business where more than half of net revenue is net interest income that shrinks when the Fed cuts, so we own it as a Tactical quality-growth position, not a table-pounding core buy.
◆ Synthos call — WatchIBKR is a business we want at a price we don't have — it becomes a Buy below ~$84; until then, do nothing.
Downside Risk (lower = safer)
5/10 · Moderate
Net-cash fortress & 90% pretax margins — but 39× trailing, beta 1.33 and rate-sensitive NII.
Account growth still accelerating (+31% YoY) with a global TAM; capped only by a rich multiple & rate-cut drag on NII.
⚖ Reverse-DCF cross-checkMarket-implied growth ≈ 32%/yrTo justify today’s $91, earnings would have to compound roughly 32% a year for 10 years (9% discount rate). Analysts forecast ~21%/yr, so the market is pricing in MORE than what the Street expects.What do the 5 tiers mean? (Core · Tactical · Watch · Hold · Avoid)
Buy — CoreOwn it as a foundation — start or add now, size it for years, let dips be gifts.
Buy — TacticalGood price + confirmed trend + a defined exit — buy the setup, not a marriage.
WatchWe want the business, just not at this price/setup — act only when the listed trigger hits.
HoldFine to keep if you own it — no reason to buy more; new money does better elsewhere.
AvoidDon't own it — the problem is the business or the expectations, so a cheaper price won't fix it.
In plain English
Interactive Brokers runs the plumbing that lets people and professional traders buy and sell stocks, options, and futures all over the world — cheaply and by computer. Think of it as the Costco of stock brokerages: rock-bottom prices, run so efficiently that customers show up on their own. Accounts are growing about 31% a year, and the company keeps roughly 90 cents of every revenue dollar before tax — extraordinary.
The catch: the stock is expensive (you pay about $39 for every $1 of yearly profit), and a big chunk of its money comes from interest it earns on customer cash. When the Federal Reserve cuts interest rates, that income shrinks. So this is a wonderful business at a full price with a genuine weather-vane risk.
Our verdict is Buy — Tactical: a good company worth owning, but sized as a smaller "satellite" position and ideally bought on dips, not chased.
Here's what our three scores mean in everyday terms:
Downside Risk 5/10 (middle). The company has more cash than debt and never blows up operationally — but it's priced high and its shares tend to swing more than the overall market.
Growth Quality 8/10 (very good). Fast, clean, high-margin growth with a real cost advantage.
Exponential Potential 6/10 (moderate-high). Account growth is still speeding up and the world is a big market — but the rich price and rate sensitivity keep it from a slam-dunk 10.
The one big worry: if interest rates fall a lot, a large slice of IBKR's profit falls with them.
Solid = price · dashed = 50-day average · dotted = 200-day average · amber = 52-week high/low. Price above both averages is an uptrend.
Bollinger Bands 20-day average ± 2 standard deviations
The shaded band widens when the stock gets more volatile. Riding the upper edge = strong momentum (sometimes stretched); the lower edge = weak / potentially oversold.
Blue crossing above amber (bars flip green) = momentum turning up; below (bars red) = turning down. Bar height = the size of that gap.
Relative performance vs S&P 500 & its sector (XLF (sector)), set to 100 a year ago
Solid = IBKR · dashed = S&P 500 · dotted = XLF (sector). A rising line means it is beating that benchmark — the sector line shows whether it is a leader or laggard within its own group.
Darker bars = actual results, brighter = analyst estimates. Taller bars to the right = expected growth.
Key stats an RIA wants
Price$91.33
Market cap$157B
P/E trailing4×
P/E FY26E / FY27E36× / 31×
EV / Sales12.3×
EV / EBITDA13.9×
Gross margin91.7%
Net margin9.8%
Dividend yield0.36%
Beta1.329
52-wk range$57 – $97
RSI(14)55
50 / 200-DMA$86 / $74
12-mo return+62% (SPY +21%)
Street target$88 ($82–$98)
Analyst grades10 Buy · 8 Hold · 1 Sell
FMP ratingB-
Next earnings2026-08-05
What the experts actually said 11 traceable claims on IBKR · showing the highest-conviction voices
“Lowest-cost, most-automated broker with highest quality; flywheel compounds account growth without marketing, driving durable share gains.”
Business Breakdownsbullishconviction 882025-05-17business_breakdowns-xNHPgKQCiBI:06a78e80fd
“Prefer brokers over exchanges—IBKR at record high heading for 100, bought Robinhood last week and it looks great.”
Compound And Friendsbullishconviction 65n/acompound_and_friends-QzbZSLClQag:f7741681fa
Every claim reconciles to a real claim_id in the Synthos knowledge base — this is the evidence the verdict is built on, not vibes. Management (the company itself) is shown but half-weighted; one cautionary voice is included on purpose.
1. What it is
Interactive Brokers (NASDAQ: IBKR) is a ~$157B automated global electronic broker founded in 1977, headquartered in Greenwich, CT, and run by CEO Milan Galik (founder Thomas Peterffy is Chairman and remains the controlling shareholder). It handles trade execution, clearing, custody, and financing across equities, options, futures, FX, bonds, funds, metals and crypto on 170+ markets worldwide, serving individual investors, hedge funds, prop desks, RIAs and introducing brokers. Fiscal year ends December 31.
Corporate-structure note (important for every per-share number below): IBKR the public company (IBG Inc.) owns only a minority economic slice of the operating partnership (IBG LLC); founder-affiliated holders own the rest via a noncontrolling interest. So of FY25 total net income of $4.36B, only $984M is available to common stockholders — EPS is $2.23. Market cap, P/E and our targets are all on this common-shareholder basis. This is not leverage or a red flag; it is just the LLC "Up-C" structure — but it explains why a business with $4B+ of total profit carries a "only" $157B cap.
Revenue mix (net revenues — the figure that matters, not gross interest):
By source (Q1'26 run-rate, from the earnings release): Net interest income $904M (~54%) · Commissions $613M (~37%) · Other fees & services $86M · Other income $66M. Net interest income is the single largest and most rate-sensitive line.
By product (FY25 fee detail, FMP): Commissions $2.15B · Risk-exposure fees $80M · Market-data fees $79M · Payments for order flow $51M.
By geography (FY25 net revenue, FMP): US $4.32B (70%) · Non-US $1.88B (30%). Non-US is the faster grower (from $1.60B in FY24, +18%), which is the international-expansion leg of the story.
2. The expert thesis — why the (thin) panel is bullish (traceable)
Honest breadth disclosure up front: this is NOT a deep-coverage name in the Synthos KB. There are 11 total claims and only 2 net-bullish voices — an order of magnitude below a conviction-track name like LLY (251 claims, 13 voices). The verdict here is fundamentals- and quant-driven; the expert layer is corroborating color, not the anchor. Two threads, both traceable:
The low-cost / automation flywheel. Business Breakdowns (business_breakdowns-xNHPgKQCiBI:06a78e80fd, bullish, conviction 88, skill 1.0, 2025-05-17): IBKR is the "lowest-cost, most-automated broker with the highest quality; a flywheel that compounds account growth without marketing, driving durable share gains." This is the crux of the bull case and it is visible in the numbers (SG&A is ~2.6% of revenue; accounts +31% YoY with negligible ad spend).
Brokers over exchanges, momentum intact. Compound & Friends (compound_and_friends-QzbZSLClQag:f7741681fa, bullish, conviction 65, skill 1.0): prefers brokers to exchanges — "IBKR at a record high heading for 100" — a momentum/relative-preference call rather than a valuation one.
Honest weighting. Both voices carry skill 1.0 (competent, not elite like a 2.0 selector), and the second is an explicitly momentum-flavored take near the highs. Net conviction is meaningfully positive (~+76 signed) but on thin breadth — so we cap conviction at Low-Moderate and lean on the fundamentals.
3. Synthos scores & the Bull / Base / Bear cases
The one-glance judgment — three scores, 0–10, each anchored to real metrics (not probabilities we can't honestly calibrate):
Score
0–10
The read
Downside Risk(lower = safer)
5 · Moderate
Net-cash balance sheet (net debt −$4.9B, net-debt/EBITDA −2.8×) and no credit risk of its own, but 39× trailing, beta 1.33, and ~54% of net revenue is rate-sensitive NII — a rate-cut cycle is a real earnings headwind.
Growth Quality
8 · Very High
Accounts +31% YoY, customer equity +38%, net-revenue CAGR ~14% forward, 88% EBITDA margin, ROE ~20%, a structural cost moat — near-flawless growth, only shy of a 9 because a chunk of recent growth was rate-driven, not purely organic.
Exponential Potential
6 · Moderate-High
The acceleration is real (accounts +31% and rising; DARTs +24%) against a global TAM, so this scores above a decelerating megacap — but a 36× forward multiple and NII sensitivity cap the fast multibagger.
The three cases (our own scenario model — assumptions shown; each target is a ~12–18-month fair value). We deliberately do not attach probabilities: the base case is by definition the expected path, so a weighted blend would just restate it. The cases bound the range; the scores summarize them.
Case
Key assumptions
Fair value
Bull
Rates hold higher-for-longer; account growth stays 25%+; international ramps; FY27E EPS beats to ~$3.10 (vs $2.90 cons) and the market keeps a premium ~41×.
~$128 (+40%)
Base(our anchor)
Estimates roughly hit — FY27E EPS $2.90; a durable ~15% compounder with an 88% EBITDA margin holds a ~33× multiple.
~$96 (+5%)
Bear
Aggressive Fed cuts compress NII; commission growth normalizes; FY27E EPS misses to ~$2.55 and the multiple de-rates to ~25×.
~$64 (−30%)
Synthos fair value = the base case, ~$96 (+5%), with the full $64–$128 span as the honest range. Our base sits just above the Street's $87.67 consensus (we give the account-growth flywheel more credit) while our bear is below the Street's $82 low (we take the rate-cut/NII risk seriously). This is a tracked call — the Forecaster Scorecard grades it once it matures. Note the modest base-case upside: after a +62% twelve-month run, much of the good news is already in the price.
4. Exponential Potential
Synthos separates compounders (durable high returns on capital) from exponentials (accelerating, multi-baggers-from-here). IBKR is a high-quality compounder with genuine, still-accelerating operating momentum — which is why it scores a 6, above a decelerating megacap:
Acceleration (the 2nd derivative) — the bright spot: the operating metrics are still speeding up, not slowing. Customer accounts +31% YoY to 4.75M, customer equity +38% to $789B, DARTs +24%, margin loans +35% (all Q1'26 vs year-ago, from the earnings release). Unlike a law-of-large-numbers megacap, IBKR's account funnel is accelerating.
Room to run: a ~$157B cap against a genuinely global brokerage/custody TAM (retail + professional across 170 markets) leaves real runway; IBKR still has low-single-digit share of most non-US markets. Demand is not the binding constraint.
The two brakes (why it's a 6, not a 9): (1) the valuation already embeds a lot of this — 36× forward; and (2) roughly half of net revenue is net interest income, so a rate-cut cycle can flatten reported growth even as accounts keep compounding. A cheaper, less-rate-levered version of this same growth would score 8–9.
Exponential Potential: Moderate-High. Own it for accelerating account growth + a structural cost moat, with clear eyes on the rate lever.
Net revenues: FY25 ~$6.12B (US $4.32B + non-US $1.88B), up ~18% on FY24's ~$5.19B. (FMP's headline "revenue" of $10.23B is gross interest income and overstates the economic top line — we use net revenues throughout.)
Quarterly trajectory: Q1'25 $1.43B → Q2 → … → Q1'26 net revenues $1.67B, +17% YoY, driven by commissions +19% and NII +17%.
Margins:pretax margin 77% (Q1'26), EBITDA margin ~88% TTM, gross ~92% — among the highest of any S&P 500 financial. SG&A is ~2.6% of revenue: the automation moat, quantified.
Earnings (common basis): FY25 net income available to common $984M, EPS $2.23 (up from $1.75 FY24, +27%); Q1'26 EPS $0.59 diluted. Remember $3.4B of additional profit accrues to the noncontrolling interest.
Returns: ROE ~19.9% TTM, ROIC ~3.8% (depressed by the huge low-yield customer-asset balance sheet — normal for a broker).
Balance sheet: essentially net cash — net debt −$4.9B, net-debt/EBITDA −2.8×, total debt just $19M. Total equity $21.3B (incl. NCI). A fortress; the leverage ratios you see (financial leverage 39×) are customer assets, not house risk.
Cash flow: operating CF is dominated by customer-balance swings (not a clean FCF read for a broker); FCF yield screens ~10.7% TTM but should be read with the balance-sheet caveat.
6. Valuation — priced in or room?
There is no way to call IBKR cheap: 39× trailing EPS, 7.3× book, 13.9× EV/EBITDA, ~15× sales. FMP's letter rating is B- with valuation sub-scores of 1/5 on P/E and P/B — i.e. richly valued on the screens. The bull's defense is that EPS keeps growing into the multiple: on consensus the forward P/E compresses to 36× (FY26E) → 31× (FY27E) → 24× (FY29E). A PEG of ~2.6× forward is full, not egregious for a business of this quality and margin. The single biggest valuation swing factor is not the multiple but the rate path — because NII is ~54% of net revenue, the same multiple on lower rate-driven earnings is how the bear case gets to $64. Street targets (context): consensus $87.67, high $98, low $82 — our $96 base is modestly above consensus. Not a value buy; a quality-growth-at-full-price buy whose margin of safety depends on rates staying reasonably firm.
7. Technicals (from the tech block)
Trend:up. $91.33 sits above the 50-DMA ($86.07) and well above the 200-DMA ($73.50) (golden-cross posture), MACD +1.57 (positive).
Location:−5.7% off the 52-week high ($96.82), +61% off the 52-week low ($56.62) — a leadership name near highs with a shallow max drawdown (−5.7%).
Momentum: RSI(14) 55 — constructive, not overbought (<70). No stretched-entry warning.
Relative strength: IBKR +62% 12-mo vs SPY +21% and QQQ +30%; +34% 3-mo vs SPY +14%. Persistent, broad outperformance.
Read: technicals confirm the fundamental uptrend. Given only ~5% base-case upside, a lower-risk entry is a pullback toward the rising 50-DMA (~$86) rather than chasing near the high.
8. Moat & competitive position
IBKR's moat is a structural cost advantage compounded by automation: four decades of in-house technology let it run at ~2.6% SG&A/revenue and offer the lowest all-in costs (financing, commissions, FX) in the industry, which pulls in sophisticated and professional customers without marketing spend — the flywheel the KB flags (business_breakdowns-xNHPgKQCiBI:06a78e80fd). Add breadth (170+ markets, every asset class, multi-currency) that few rivals match, and founder alignment (Peterffy control). The threats: fee compression, a Robinhood-style UX land-grab in retail, and — the real one — falling rates shrinking NII.
Peer set (market cap, from FMP). IBKR sits in a mixed "Investment Banking & Investment Services" bucket:
Direct broker comp: Robinhood (HOOD) ~$102B — faster retail-user growth, but lower-quality revenue and less professional depth.
Exchanges: CME ~$86B, ICE ~$75B — the "exchanges" IBKR bulls prefer to under-own (compound_and_friends-QzbZSLClQag:f7741681fa).
Banks / diversified financials (not clean comps): Bank of America ~$417B, UBS ~$167B, BBVA ~$143B, Chubb ~$140B, ICICI ~$106B, Brookfield ~$97B, KKR ~$84B.
Against HOOD, IBKR is the higher-quality, more-professional franchise; against exchanges, it is the faster grower. Its premium multiple is defensible only while account growth and margins persist.
9. Management, capital allocation & guidance
Capital allocation: conservative and shareholder-aligned. IBKR retains capital to fund the growing balance sheet, pays a modest and rising dividend (raised to $0.0875/quarter in Q1'26, from $0.08), and does only token buybacks (~$84M FY25) — appropriate for a capital-intensive, fast-growing broker. Payout ratio ~14%.
Insider activity (mixed, mostly mechanical): the May 2026 cluster of executive dispositions (CEO Galik, CFO Brody, others at $84.42) are F-InKind tax-withholding events tied to equity vesting — not open-market sales, so not a bearish signal. On the other side, director Lori Conkling made small open-market purchases in May–July 2026 ($79.64 → $86.10 → $88.03) — a modestly positive tell.
Management's own guidance (half-weighted by design): the Q1'26 earnings release (SEC 8-K Item 2.02, filed 2026-04-21) is a real earnings release with detailed results, but IBKR does not issue explicit forward financial guidance (no revenue/EPS outlook) — consistent with its long-standing practice. What management did emphasize, in its own self-interested words (half-weight): accounts +31%, customer equity +38%, DARTs +24%, margin loans +35%, pretax margin 77%, and a dividend raise. Forward numeric guidance was not available — we do not fabricate it; the forward figures in this note are analyst consensus, labeled as estimates.
10. Catalysts & what to watch
Next earnings: 2026-07-21 (Q2'26; Street EPS $0.59). Key lines: net interest income trajectory vs the rate path, account adds, and commission/DART momentum.
Fed rate path: the dominant swing factor — cuts compress NII (~54% of net revenue); a higher-for-longer path is the bull case.
Account & DART growth: any deceleration below ~25% YoY account growth would dent the exponential thesis.
International mix: non-US net revenue (30% and growing faster) is the durable, less-rate-levered growth leg — watch its share.
Product expansion: crypto, forecast/event contracts, and RIA-custody share gains.
Thesis tripwires (what would change the call): two consecutive quarters of account-growth deceleration below ~20%; NII falling faster than commission growth can offset; or the multiple re-rating above ~45× forward without an earnings beat to justify it.
11. Key risks
Rate sensitivity (structural, the #1 risk): ~54% of net revenue is net interest income; a Fed-cut cycle directly compresses it. This is the core of the bear case.
Valuation / de-rating: 39× trailing and 7.3× book leave little cushion for any growth or rate disappointment.
Beta / drawdown: beta 1.33 — the stock will fall more than the market in a risk-off tape, and much of a +62% run is already priced.
Retail competition & fee compression: Robinhood and others contesting the retail funnel; ongoing pressure on commissions and PFOF.
Controlled-company / structure: Peterffy voting control and the Up-C structure limit outside-shareholder influence; the common float owns only a minority economic slice.
Thin expert coverage: only 2 net-bullish voices / 11 claims — less independent corroboration than a conviction-track name, so more of the call rests on our own model.
12. Verdict, position sizing & monitoring
Buy — Tactical. IBKR is a genuinely elite business — the lowest-cost, most-automated broker, compounding accounts +31% with ~90% pretax margins, a net-cash fortress balance sheet, and operating momentum that is still accelerating. But three things keep it out of the Core sleeve: a full 39× multiple after a +62% run, beta 1.33, and the fact that ~54% of net revenue rides on interest rates that are more likely to fall than rise. Modest ~5% base-case upside means you are buying quality, not a bargain — so size it accordingly and prefer dips.
Sizing:satellite quality-growth, ~2–4%. Scale in on rate-cut-driven weakness or a pullback toward the rising 50-DMA (~$86) rather than chasing near the 52-week high.
Monitoring: re-underwrite on the §10 tripwires; formal re-score each earnings print — especially the NII line against the rate path. This verdict is logged as a tracked Synthos call as of 2026-07-03 at $91.33.
Single biggest risk: falling short-term rates compressing net interest income — the whole margin of safety depends on rates staying reasonably firm.
Provenance & disclosures
Traceability: 11 KB claims, breadth 2 net-bullish voices, top skill 1.0 (Business Breakdowns, conviction 88), last claim 2026-05-17 — all reconciled to real claim_ids (cited inline). Fabricated conviction is structurally impossible (claim-ID reconciliation). This is a thin-coverage name; the verdict is fundamentals- and quant-driven, corroborated by a small panel.
Data as-of: fundamentals 2026-03-31 (Q1'26) · estimates & prices 2026-07-02/03 · expert claims through 2026-05-17. Forward figures are analyst consensus (FMP), labeled as estimates.
Structure caveat: all per-share figures, market cap and targets are on the common-stockholder basis; ~78% of total net income accrues to the IBG LLC noncontrolling interest.
Management caveat: IBKR issues no explicit forward guidance; management's Q1'26 operating commentary is its own book, half-weighted by design.
Not investment advice. Independent research, educational and informational only, never personalized. Hypothetical/forward figures are labeled; the only performance numbers Synthos will headline are the live, real-money Flagship's.
Version: 2026-07-03. Prior versions available via the deep-dive version dropdown ("based on the info at the time").