eBay (EBAY) Stock Concentration Calculator
Calculator · free · no signup · EBAYQuantify eBay 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 eBay
eBay (EBAY) is a public Marketplace company, incorporated in Delaware and headquartered in San Jose, CA.
Equity grants at eBay typically include restricted stock units (RSUs).
eBay Inc. is an American multinational e-commerce company based in San Jose, California, that allows users to buy or view items via retail sales through online marketplaces and websites in 190 markets worldwide. Sales occur either via online auctions or "Buy It Now" instant sales, and the company charges commissions to sellers upon sale. eBay was founded by Pierre Omidyar in September 1995. In 2021, eBay had approximately 17 million global sellers; in 2023, it reported 132 million annual active buyers worldwide and handled $73 billion in transactions, 48% of which were in the United States. In 2023, the company had a take rate of 13.81%.
Source: Wikipedia (CC BY-SA 4.0)
Pierre Omidyar wrote AuctionWeb over a 1995 Labor Day weekend, and the first sale was a broken laser pointer bought by a collector of broken laser pointers. The San Jose marketplace never took inventory, which kept the model asset-light through the retail wars that followed. PayPal was acquired in 2002 and spun off in 2015; StubHub and the classifieds portfolio were later divested. Auctions have largely given way to fixed-price listings, and the company now leans on managed payments and advertising, with categories like collectibles, parts, and refurbished goods carrying the volume.
Sources: ebayinc.com · en.wikipedia.org
Equity comp at eBay
- RSUs use single-trigger vesting: shares become yours as each portion vests on schedule, and the value is taxed as ordinary income at that point. No IPO or acquisition is required.
Researched 2026-08-17.
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by eBay.
If a meaningful share of your net worth sits in EBAY, 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 EBAY's option-implied volatility.
All eBay tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
eBay equity questions
- How much EBAY 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 EBAY position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
- Does eBay grant ISOs, NSOs, or RSUs?
- Equity compensation at eBay typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
- Do eBay RSUs use double-trigger vesting?
- No. eBay restricted stock units (RSUs) use single-trigger vesting: each tranche becomes yours as it vests on schedule, taxed as ordinary income at that point, with no liquidity event required.
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OptionsAhoy plans your eBay equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.