This website uses cookies to collect usage information in order to offer a better browsing experience. By browsing this site or by clicking on the "ACCEPT COOKIES" button you accept our Cookie Policy.

Naked and Exposed


Chief Strategist at Interactive Brokers

The topic of naked shorting reared its, ahem, head recently for the first time in quite a while.  It was a top trending topic over the past couple of days.  For those of you who either were caught up in the online debate or watched it from the sidelines, it seems useful to offer a refresher about the mechanics of short selling.

Let me start with a reminder – short selling is legal, ethical, and a necessary lubricant to the smooth functioning of the market.  The practice certainly has a bad ring to it – selling shares that you don’t own with the hope and/or expectation that the price of the stock will decline.  It runs counter to everything we are told about why we should invest.  The dogma is that we want to be investing in quality companies to participate in their growth, and that buying shares of undervalued companies is a path to long-term success.  There is certainly truth to that statement, but why wouldn’t the opposite be true?  If there is money to be made from buying under-valued stocks, shouldn’t there be money to be made from selling over-valued stocks?  That is the bet that a short seller is taking.

Short sellers know, or at least should know, that they are taking on exceptional risks when shorting.  For starters, the risk/reward is skewed against them.  Stocks can only fall to zero, but can rise infinitely.  Furthermore, all short sales require borrowed shares.  Remember, whomever is on the other side of a short sale expects to have shares delivered on settlement.  The short seller borrows shares to facilitate delivery, and anytime you have to borrow something (money or shares) you have to assume the liability for repayment.  Thus, by definition, short selling is done with margin and riskier than a cash purchase.  (I explained much more about the stock borrowing process in this article.)

If the odds are against the short seller, why do it?  In the case of a speculative short, the sellers have a strong conviction that the risk/reward is in their favor.  Hopefully they understand the risks, not only that the stock might rise but also that the cost or availability of their borrowed shares can move adversely.  But there are many relatively benign and even market-friendly reasons for short sales.  Index arbitrage is one. If there is aggressive selling in index futures or ETFs, an arbitrageur will attempt to sell the index composition – often short – against buying the futures.  This activity uses short-selling to stabilize the market.  The ability to short index components allows them to place bids in the plunging futures or ETFs.  Markets become much less liquid and more volatile if that feature is inhibited.  The same is true for ADRs and inter-listed shares.  If there is excessive demand or supply in one marketplace, short sellers can help balance the flows.  Market makers find themselves selling short all the time.  They are required to make continuous two-sided markets and they are not always long the shares that someone wants to buy.  Again, this is beneficial to the smooth functioning of the marketplace.

Naked shorting – the practice of selling short without properly borrowing shares — came back into the public debate last week, largely because of a blurted comment by a CNBC host.  During a segment on CNBC’s Fast Money, Melissa Lee blurted out “naked shorting, yeah” during comments made by Tim Seymour.  (It’s at the 1:40 mark of this clip).  The internet took that as evidence of nefarious activity.  It is not.  A three word utterance by a TV host, treated as a non-sequitur by her guest, is not even close to offering proof that a conspiracy of naked shorting is occurring en masse.[i] 

Naked short selling is generally illegal[ii], and brokerage firms typically go to great lengths to prevent their customers from selling shares short without first determining whether they can borrow the shares on the customer’s behalf.  Obviously because something is illegal and discouraged doesn’t mean that it isn’t going on somewhere.  I can’t prove that naked shorting isn’t occurring at all.  But I can assert with reasonable assurance that it is uncommon at most.  It is simply not worth the trouble for compliant brokerage firms to allow it. 

I suspect that some people are confusing naked short sales of stock with naked options selling.  The latter activity is legal.  I suspect that some of the confusion stemmed from this Bloomberg article with the following quote from a Jefferies corporate memo: “Until further notice, Jefferies Prime Brokerage will no longer offer custody on naked options in GME, AMC and MVIS”.  Naked options selling can be a very risky activity, but is fundamentally different than selling stocks short.  Remember, when you short a stock you are required to locate someone who will lend the shares to you.  Naked options don’t require a borrower.  As long as your broker believes that you have sufficient margin to cover your risk, the only requirement for shorting an option is finding a buyer.  You are not exchanging a security, you are exchanging the right, but not the obligation to buy or sell shares.  That sale is guaranteed by the Options Clearing Corporation (OCC), not by a stock lender.  It is a seemingly minor distinction, but a crucial one. 

While we’re clearing up some internet information about naked short selling, we might as well clear up another source of misunderstanding.  This concerns the ability to withhold stock lending. There are many meme stock investors who want to avoid lending their shares to facilitate short selling.  I understand the impulse – it is understandable why a committed investor would want to discourage those who bet against their holdings – but I question the logic.  If much of the rally in meme stocks can be attributed to short squeezes, one might prefer to encourage shorting.  That said, visceral impulses have propelled meme stocks, so I respect the holders desire to clamp down on the activity.  There is only one way reliable way to do that.

If you hold fully paid shares in AMC or another meme stock and don’t want those shares lent, you need to move them to a cash account and inform your broker that you don’t want to lend them.  If you hold the shares in a margin account, even if they are fully paid, they are actually held by your broker on your behalf.  That is often called “street name.”  Shares that are held in street name can be lent by the broker who holds them, and we can be certain that a broker would be eager to lend hard-to-borrow shares at a highly favorable rate.  If you own the shares in a cash account, the broker can’t lend your shares without your permission.  That is it.  There are incorrect suggestions floating around the internet.  A popular one says that if you use limit orders, your broker can’t lend your shares.  That is ridiculous.  Stock loan is part of the clearing process, not the trading process, and how an order was placed has no bearing upon what happens after the trade is executed. 

Many have described the trading in meme stocks as a mania.  I don’t disagree with that description.  The level of hyperbole, enthusiasm, and yes, misinformation, has moved the activity in this eclectic group of stocks from normal investing to something beyond.  My goal throughout this process has been to provide facts that can help investors understand the mechanics behind the mania.  Opinions can be debated, but the debate is much more productive when it is factual.

GameStop Showed Short Interest > Float. How Could That Be? – Traders’ Insight (

[i] Full disclosure – I have appeared on Fast Money with Melissa Lee.  The appearance was remote, so I’ve never met her or the panelists in person.  I have no reason to defend them if I felt they admitted something incorrect. 

[ii] While abusive short selling is illegal, naked short selling is not always abusive or illegal.  The Securities and Exchange Commission (SEC) recognizes that there are circumstances under which naked short selling is not a violation of securities law.  See this website and this website from the SEC for their guidance.

Disclosure: Interactive Brokers

The analysis in this material is provided for information only and is not and should not be construed as an offer to sell or the solicitation of an offer to buy any security. To the extent that this material discusses general market activity, industry or sector trends or other broad-based economic or political conditions, it should not be construed as research or investment advice. To the extent that it includes references to specific securities, commodities, currencies, or other instruments, those references do not constitute a recommendation by IBKR to buy, sell or hold such investments. This material does not and is not intended to take into account the particular financial conditions, investment objectives or requirements of individual customers. Before acting on this material, you should consider whether it is suitable for your particular circumstances and, as necessary, seek professional advice.

Disclosure: Margin Trading

Trading on margin is only for sophisticated investors with high risk tolerance. You may lose more than your initial investment.

For additional information regarding margin loan rates, see

Disclosure: Options Trading

Options involve risk and are not suitable for all investors. For more information read the Characteristics and Risks of Standardized Options, also known as the options disclosure document (ODD). To receive a copy of the ODD call 312-542-6901 or copy and paste this link into your browser:

trading top