How to Short MicroStrategy (MSTR) Stock

Three real ways to short MSTR — borrow-and-sell, put options, or inverse ETFs (SMST, MSTZ). Borrow rates, decay math, and the squeeze risk.

Updated June 2026 · Educational only, not financial advice

Three methods: borrow shares and sell short, buy MSTR puts, or use a daily-reset inverse ETF like SMST or MSTZ

MSTR trades at a persistent premium over the value of its bitcoin holdings. Borrow rates have run 5–15% annually due to high short interest, and single-day +20% moves are common.

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About this topic

Shorting MSTR means betting that MicroStrategy's share price will fall, usually because you believe the premium it trades over its bitcoin holdings will shrink. There are three real ways to do it: borrow shares and sell them short, buy put options, or hold an inverse ETF. Each has different fees, account requirements, and risk profiles.

MicroStrategy (ticker MSTR) is not a normal software company anymore. As of its 2025 filings the firm holds well over 550,000 bitcoin on its balance sheet (per its 2025 10-Q filings), and the stock now trades largely as a leveraged bitcoin proxy. That is why the playbook for shorting MSTR is closer to shorting a leveraged ETF than shorting a software stock.

The short thesis most traders cite is the mNAV premium. MSTR has at times traded at 2x to 3x the market value of the bitcoin it owns, meaning you are paying two or three dollars in stock for every one dollar of bitcoin on the books. Shorts bet that premium compresses toward 1x.

That thesis has been right and wrong in waves. MSTR has posted multiple single-day moves above 20%, in both directions, since 2023. Short squeeze risk is real and has wiped out leveraged short positions overnight.

This page is educational only and not financial advice. Confirm any trade with your broker, and check your own tax situation with a qualified advisor before opening a short.

How it actually works

Shorting MSTR works by giving you a position that gains value when the stock falls. The three methods get there through different plumbing: direct share borrowing, derivatives, or a fund that does the work for you.

Method one is the classic short sale. Your broker locates shares of MSTR from another customer or institution, lends them to you, and you sell them on the open market. You owe the lender those shares back, plus a daily borrow fee. When (and if) MSTR drops, you buy the shares back cheaper and pocket the difference. Borrow fees on MSTR have run roughly 5% to 15% annualized because short interest sits around 15-20% of float. Interactive Brokers publishes live borrow rates daily on its Securities Lending dashboard.

Method two is buying puts. A put option on MSTR gives you the right to sell the stock at a set strike price before a set expiration date. MSTR options are listed on CBOE and are among the most liquid single-name option chains in the US, with weekly expiries and tight bid-ask spreads. Your maximum loss is the premium you paid; your maximum gain is large if MSTR falls fast. Put spreads (buy one put, sell a lower-strike put) cap both sides and lower the cost.

Method three is inverse ETFs. The Defiance Daily Target 2X Short MSTR ETF (ticker SMST, expense ratio 0.95%) and the T-Rex 2X Inverse MSTR Daily Target ETF (ticker MSTZ, expense ratio 1.05%) both aim to deliver -2x the daily return of MSTR. Critically, both reset every single day. Held for more than a few days in a volatile stock like MSTR, compounding decay means your return will diverge — often badly — from -2x the period return. These are day-trading and short-swing tools, not buy-and-hold positions.

Inside an IRA or Roth IRA you cannot short MSTR directly, because the IRS prohibits margin borrowing in retirement accounts. You can, however, hold SMST or MSTZ or buy long puts in an IRA at most brokers, since both are cash-settled long positions.

Step by step

1Pick your method first: direct short sale for the cleanest exposure, put options if you want defined risk, or inverse ETFs (SMST or MSTZ) if you only have a cash or IRA account.
2If shorting directly, enable margin on your brokerage account and confirm MSTR is on your broker's 'easy to borrow' list — then check the live borrow fee (Interactive Brokers publishes it daily).
3If buying puts, open the MSTR options chain on CBOE, pick an expiration at least 30-60 days out to limit theta decay, and consider a put spread to lower premium cost.
4If using an inverse ETF, place a market or limit order for SMST or MSTZ during regular hours — do not hold these positions overnight for long periods due to daily reset decay.
5Size the position so a 20%+ single-day move against you does not blow up your account; MSTR has posted multiple such moves since 2023.
6Set hard stop-losses or, for short shares, mental triggers — short positions have theoretically unlimited loss, and squeezes happen fast on MSTR.
7Track the mNAV premium (MSTR market cap divided by the dollar value of its bitcoin holdings) using MicroStrategy's investor relations page; that is the actual short thesis indicator.

What works in your favor

Defined-risk options strategies (long puts, put spreads) cap your maximum loss at the premium paid — critical given MSTR's history of 20%+ single-day rallies.
Inverse ETFs SMST and MSTZ let you take a 2x short position inside a cash account or IRA, with no margin approval and no borrow fee headaches.
MSTR options on CBOE are deeply liquid with weekly expiries, tight spreads, and a full strike ladder — you can express almost any bearish thesis precisely.
Live borrow rates and short interest data are transparent (Interactive Brokers, FINRA short interest reports), so you can price the carry cost before opening a position.
The mNAV premium is publicly trackable from MicroStrategy's own investor materials, giving shorts a concrete thesis indicator rather than vibes.

Watch out for

MSTR borrow fees often run 5-15% annualized, which silently eats your short P&L every single day you hold the position.
Short squeeze risk is extreme — MSTR has posted multiple +20% single-day rallies tied to bitcoin price spikes and index inclusion news.
Inverse ETFs like SMST and MSTZ reset daily and suffer compounding decay; held more than a few days they often underperform the simple inverse return.
Put options expire — if MSTR stays flat or rises through expiry, you lose 100% of the premium even when your thesis is eventually right.
Direct short selling is not permitted inside an IRA or Roth IRA at any major US broker, so retirement-account investors are limited to long puts or inverse ETFs.

Common questions

Can I short MSTR in my IRA or Roth IRA?

No, you cannot short-sell MSTR shares inside an IRA at any major US broker. IRS rules prohibit margin borrowing in retirement accounts, and short selling requires a margin account. You can, however, buy MSTR put options or hold inverse ETFs like SMST or MSTZ in an IRA, since both are cash-settled long positions. This page is educational only and not financial advice — confirm with your broker.

What is the current borrow fee on MSTR?

MSTR borrow fees have historically ranged from roughly 5% to 15% annualized, depending on demand and float availability. Interactive Brokers publishes live borrow rates on its Securities Lending page, and the rate updates daily. During periods of heavy short interest — MSTR short interest has run 15-20% of float — the fee can spike higher. Always check the live rate before opening a short.

Why does MSTR trade above the value of its bitcoin?

MSTR trades at a persistent premium (called mNAV) above the market value of its bitcoin holdings, often 1.5x to 3x. The market prices in management's ability to issue equity and convertible debt to buy more bitcoin per share over time, plus the convenience of bitcoin exposure inside a regular brokerage or retirement account. Shorts bet that this premium will compress toward 1x, especially now that spot bitcoin ETFs (IBIT, FBTC) launched in January 2024 offer cleaner exposure.

What is the difference between SMST and MSTZ?

SMST (Defiance Daily Target 2X Short MSTR) and MSTZ (T-Rex 2X Inverse MSTR Daily Target ETF) both target -2x the daily return of MSTR. SMST has a 0.95% expense ratio and MSTZ has a 1.05% expense ratio. Both reset daily, so compounding decay will erode returns if held longer than a few days in a volatile stock like MSTR. Pick based on expense ratio, AUM, and intraday spread on the day you trade.

How risky is shorting MSTR compared to shorting normal stocks?

Shorting MSTR is materially riskier than shorting a typical S&P 500 stock because MSTR functions as a leveraged bitcoin proxy. The stock has posted multiple single-day moves of 20% or more since 2023, in both directions. A 30-day historical volatility above 80% is common. Direct short shares carry theoretically unlimited loss, which is why most retail traders prefer defined-risk put spreads or inverse ETFs.

Can I just short bitcoin instead?

Yes, and it is often cleaner. You can short the spot bitcoin ETFs (IBIT, FBTC, etc., launched January 2024) or use inverse bitcoin ETFs like BITI. This removes the mNAV premium variable entirely. Shorting MSTR is specifically a bet that MicroStrategy's premium over its bitcoin compresses — not a pure bearish bitcoin bet.

What happens to my short if MSTR does a stock split?

Your short position is adjusted automatically to reflect the split. MicroStrategy executed a 10-for-1 forward split in August 2024 — short share counts were multiplied by 10 and the cost basis per share was divided by 10, leaving total P&L unchanged. Option contracts were similarly adjusted. Check your broker's corporate actions notice for any future splits.

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