Interactive Brokers (IBKR) Stock Concentration Calculator
Calculator · free · no signup · IBKRQuantify Interactive Brokers concentration risk. Drawdown impact at 30 / 50 / 70%, with the tax-aware trade-off between selling down and hedging.
Beta · invite-only · AlphaLatitude Inc. · Free Tools
Your inputs
Adjust — results update instantly.Position & portfolio
Tax
Most fee-only advisors target ≤10% in any single name. You're at 67%.
Estimates only. Not financial advice.
Most sensitive to: Expected market return (±10% on this input swings best-plan wealth by ±$190,508).
Cost of fully de-concentrating
All three plans sell to 0% (no hedge).Sensitivity. If your expected position return drops below 19.6%/yr, lump-sum (sell everything today) beats every spread plan above.
Have multiple RSU vest lots? The RSU Lot Order Calculator picks which lots to sell first, and on which dates, to divest at the lowest computed tax.
Build your own plan
Toggle below — chart updates live. Sell buttons show the slice.Tech / Software single names hit a 50%+ peak-to-trough drawdown in roughly 1 of every 5 rolling 3-year windows over 2014–2024. Even mega-caps aren’t exempt.
Tax brackets: 2026 · Estimates only — not financial advice.
Estate note. Heirs receive a stepped-up basis at death (§1014), eliminating built-in gain on inherited shares. Older holders who plan to bequeath rather than sell may rationally never de-concentrate.
You sized one position's risk. The beta integrates hedging, sell-down, and tax timing into one optimized plan.
Request beta access →Related calculators: Protect Your Stock Calculator · RSU Lot Order Calculator · Equity Funding Plan Calculator
About Interactive Brokers
Interactive Brokers (IBKR) is a public Fintech company, incorporated in Delaware and headquartered in Greenwich, CT.
Last close: $90.56 per share (as of 2026-08-19).
Equity grants at Interactive Brokers typically include restricted stock units (RSUs).
Interactive Brokers, Inc. is an American multinational brokerage firm headquartered in Greenwich, Connecticut. It operates one of the largest electronic trading platforms in the United States by number of daily average revenue trades. Interactive Brokers is the largest foreign exchange market broker and one of the largest prime brokers servicing commodity brokers.
Source: Wikipedia (CC BY-SA 4.0)
Thomas Peterffy, who helped bring computerized pricing to options floors in the 1970s, built the firm into an electronic broker serving professional traders, hedge funds, and self-directed investors across dozens of markets. Automation is the competitive position: the cost to serve an account is low enough to support pricing that full-service brokers cannot match. Margin lending and interest on customer cash produce a large share of profit, making results rate-sensitive. Account growth has come substantially from outside the United States. Headquarters are in Greenwich, Connecticut.
Sources: sec.gov · en.wikipedia.org
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Interactive Brokers.
If a meaningful share of your net worth sits in IBKR, concentration risk is the question. This calculator quantifies drawdown impact at 30 / 50 / 70%, and the trade-off between selling down (tax cost now) versus hedging (option premium drag), auto-filled with IBKR's option-implied volatility.
Example: 5,000 IBKR shares at $90.56 is a $452,800 position. A 30% drawdown costs $135,840; a 50% drawdown costs $226,400; a 70% drawdown costs $316,960. The calculator quantifies the trade-off between selling down (immediate capital-gains tax) and hedging (option premium drag) using IBKR's option-implied volatility and your cost basis.
All Interactive Brokers tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
Interactive Brokers equity questions
- How much IBKR stock is too much?
- There is no single threshold, but the larger the share of your net worth in one stock, the more a single bad year can set back your plans. The calculator above quantifies the drawdown impact at 30, 50, and 70 percent for your IBKR position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
- Does Interactive Brokers grant ISOs, NSOs, or RSUs?
- Equity compensation at Interactive Brokers typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
Find another companyFintech peers
One piece of the puzzle.
OptionsAhoy plans your Interactive Brokers equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.