Stocks are sold through a handful of distinct channels: a company’s first public sale through an initial public offering, everyday trading on exchanges like the New York Stock Exchange and Nasdaq, dealer-run over-the-counter markets for smaller issuers, private dark pools that match large orders off-exchange, and direct stock purchase plans that let you buy from the company itself. Each channel has its own pricing mechanics, disclosure rules, and costs. Understanding how stocks are sold in each one tells you what you’re actually paying, when your trade finalizes, and what the IRS will do with any gain.
The First Public Sale: IPOs and Direct Listings
When a company sells shares to the public for the first time, the transaction happens in the primary market and the money goes directly to the company. Federal law requires the issuer to file a registration statement (Form S-1) with the Securities and Exchange Commission before those shares can be offered, disclosing financials, risk factors, and how the proceeds will be used.1Legal Information Institute (LII) / Cornell Law School. Form S-1
Investment banks underwrite most IPOs. They buy the shares from the company and resell them to an initial group of investors, charging a gross spread for the service. For mid-size offerings that spread typically runs around 7% of the total raised, though very large deals negotiate lower rates.
Direct Listings
A direct listing lets a company go public without underwriters. Existing shareholders sell their shares directly to the public, avoiding the underwriting fees. Since 2021, both the NYSE and Nasdaq have allowed companies to raise new capital through direct listings rather than only selling existing shares.2U.S. Securities and Exchange Commission. Types of Registered Offerings Without underwriters building demand, the company has no control over its initial investor base and can face thin early trading, so direct listings have generally been used by well-known brands that can generate market interest on their own.
Lock-Up Periods
After an IPO, insiders, early investors, and employees are usually barred from selling their shares for 90 to 180 days. The lock-up isn’t required by the SEC. It’s a contractual restriction imposed by the company or its underwriters to prevent a flood of shares from hitting the market and pushing the price down. The exact length appears in the company’s S-1, so you can look it up before you invest.
Restricted Stock Under Rule 144
Shares received through private placements, stock compensation, or affiliate transactions don’t trade freely. Before selling these restricted or control securities, holders must satisfy SEC Rule 144. If the issuer files regular reports with the SEC, the minimum holding period is six months; if it doesn’t, the holding period is one year. Company affiliates also face volume limits: they can sell no more than 1% of outstanding shares (or the average weekly trading volume over the prior four weeks, whichever is greater) in any rolling three-month period.3eCFR. 17 CFR 230.144 – Persons Deemed Not To Be Engaged in a Distribution and Therefore Not Underwriters
Trading on Exchanges
Once shares are in public hands, most activity moves to the secondary market. Centralized exchanges like the NYSE and Nasdaq match buyers and sellers through electronic order books, with trades executed through registered broker-dealers. The Securities Exchange Act of 1934 requires securities to be registered before they can trade on a national exchange.4Office of the Law Revision Counsel. 15 USC 78l – Registration Requirements for Securities
The NYSE still assigns designated market makers to specific stocks; their job is to maintain a fair and orderly market by standing ready to buy or sell when supply and demand are temporarily out of balance. Nasdaq operates as a fully electronic dealer market without that human intermediary. In both cases you’ll see a bid (what buyers will pay) and an ask (what sellers want). The gap between them is the spread, and it’s the market maker’s compensation for holding inventory.
Retail investors now pay zero commissions at most major brokerages, a shift that accelerated in late 2019. Trading still isn’t free. The bid-ask spread is a real cost, and your broker routes your order to whichever venue offers the best execution. Under FINRA Rule 5310, brokers must use reasonable diligence to find the best available price, considering factors like the stock’s liquidity, the size of your trade, and the number of markets checked.5FINRA.org. FINRA Rule 5310 – Best Execution and Interpositioning
Extended-Hours Trading
Regular market hours run from 9:30 a.m. to 4:00 p.m. Eastern. Trading doesn’t stop there. Pre-market sessions open as early as 4:00 a.m., and after-hours trading runs until 8:00 p.m.6Nasdaq. Market Activity Liquidity is thinner in these sessions, which means wider spreads and more volatile prices. Earnings announcements often drop outside regular hours, so extended sessions are where the initial reaction usually happens. Most brokerages offer access, but limit orders are essentially mandatory since a market order in thin liquidity can fill at an ugly price.
Circuit Breakers
When selling threatens to spiral, market-wide circuit breakers halt trading. The triggers are single-day percentage declines in the S&P 500 from the prior day’s close:
- Level 1, a 7% decline: trading pauses for 15 minutes if triggered before 3:25 p.m. Eastern.
- Level 2, a 13% decline: another 15-minute pause, again only if triggered before 3:25 p.m.
- Level 3, a 20% decline: trading halts for the rest of the day regardless of time.
Dark Pools and Off-Exchange Venues
A large share of stock trading never touches a public exchange. Dark pools are alternative trading systems that match orders privately, without displaying quotes to the broader market. They exist mainly so institutional investors can execute large block trades without telegraphing their intentions and moving the price against themselves. Recent data puts roughly half of all U.S. equity trading volume in dark pools and other off-exchange venues.
The SEC regulates these systems under Regulation ATS, and dark pools must report executed trades after the fact. For retail investors the practical effect is that your broker may route your order to an off-exchange venue if the fill price beats what’s available on the lit exchanges. That’s legal and often results in a better price, though it also means public quote data becomes less complete.
Over-the-Counter Markets
Securities that don’t meet NYSE or Nasdaq listing standards trade through decentralized dealer networks. Most over-the-counter activity now runs through OTC Markets Group’s electronic platform, organized into three tiers:
- OTCQX, the highest tier, reserved for established companies that meet financial standards and ongoing disclosure requirements.
- OTCQB, a venture-stage marketplace for companies current in their SEC or regulatory reporting.
- Pink Open Market, the lowest tier, where companies can trade without providing any public financial disclosures.
SEC Rule 15c2-11 controls who can quote these securities. Before a broker-dealer can publish a bid or offer for an OTC stock, current information about the issuer must be publicly available. The rule is designed to keep investors out of companies they have no meaningful way to evaluate.7OTC Markets. 15c2-11 Resource Center FINRA oversees the broker-dealers operating in this space.
OTC Markets Group also flags certain securities with a Caveat Emptor warning, shown as a skull-and-crossbones icon on the quote page, signaling a public interest concern involving the company, its security, or its management.8OTC Markets. FAQs Treat that symbol as a serious red flag. Penny stocks on the Pink market are where most OTC fraud occurs, and the combination of low liquidity, wide spreads, and minimal disclosure makes due diligence far harder than on major exchanges.
Buying Directly From the Company
Some companies let you skip brokerages entirely and buy shares through a transfer agent. These direct stock purchase plans, or DSPPs, often bundle in dividend reinvestment, where cash dividends automatically buy additional whole and fractional shares of the same stock.9Investor.gov. Transfer Agents Each reinvested purchase creates a separate tax lot with its own cost basis and holding period, which complicates tax reporting over time.
To sell shares held in a DSPP, you submit a request to the plan administrator, who executes the trade on the open market or through internal matching with other participants. Fees typically include a small per-share commission or a flat service charge, and minimum initial investments usually fall in the range of a few hundred dollars. You get a direct relationship with the transfer agent and the ability to accumulate shares gradually without brokerage commissions, but you also give up real-time execution, so you won’t get the exact price you see on a screen.
When Your Trade Actually Settles
Buying or selling a stock doesn’t finalize the transaction instantly. Settlement is the actual transfer of shares to the buyer and cash to the seller. Since May 28, 2024, the standard settlement cycle for most U.S. securities is one business day after the trade date, known as T+1.10U.S. Securities and Exchange Commission. SEC Chair Gensler Statement on Upcoming Implementation of T+1 Settlement Cycle Before that date the standard was T+2, and before 2017 it was T+3. If you sell stock on a Monday, the cash is available Tuesday. If you’re counting on sale proceeds to fund another purchase, plan around that one-day window.
Taxes When You Sell
How long you hold a stock before selling determines how the IRS treats your profit. Shares held for one year or less produce short-term capital gains, taxed at your ordinary income rate, which can reach 37% at the federal level. Shares held longer than one year qualify for long-term capital gains rates of 0%, 15%, or 20%, depending on your taxable income.11Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed For 2026, a single filer pays 0% on long-term gains up to $49,450 of taxable income, 15% up to $545,500, and 20% above that. Joint filers hit the 15% bracket at $98,900 and the 20% bracket at $613,700.
Qualified Dividends
Dividends that meet the IRS holding-period test get the same favorable rates as long-term capital gains. To qualify, you must hold the stock for more than 60 days during the 121-day window that begins 60 days before the ex-dividend date. Dividends that fail the test are taxed as ordinary income. The gap can be large: a taxpayer in the 37% bracket pays 20% on a qualified dividend versus 37% on a non-qualified one.
The Wash Sale Rule
Sell a stock at a loss and buy the same or a substantially identical security within 30 days before or after the sale, and the IRS disallows the loss on your current-year return.12eCFR. 26 CFR 1.1091-1 – Losses From Wash Sales of Stock or Securities The disallowed loss gets added to the cost basis of the replacement shares, so it’s not lost forever, just deferred. The rule applies across all your accounts, including IRAs and your spouse’s accounts. Year-end tax-loss harvesting is where most investors trip into wash sales without noticing.
Protection If Your Broker Fails
The Securities Investor Protection Corporation protects your brokerage account if your broker-dealer fails financially. Coverage tops out at $500,000 per customer, with a $250,000 sub-limit for cash.13SIPC. What SIPC Protects SIPC does not protect you against investment losses, bad advice, or falling stock prices. It only covers the return of your securities and cash if the brokerage itself goes under. Many brokers carry additional private insurance above SIPC limits, but read the fine print on what those policies actually cover.