Over-the-Counter Market

The over-the-counter (OTC) market is a decentralized, dealer-based trading system where securities change hands directly between buyers and sellers, typically through intermediaries called dealers or brokers. It includes the vast markets for bonds, currencies, derivatives, and commodities, as well as smaller unlisted stocks. It is the oldest form of securities trading and remains vastly larger than centralized stock exchanges by dollar volume.

The origins and nature of OTC trading

The over-the-counter market predates centralized exchanges. Historically, securities trading occurred literally over the counter in bankers’ offices and brokers’ shops. A customer wanting to buy or sell a security would approach a dealer, who would quote a price and execute the trade. This form of trading persists and is now called OTC.

OTC markets are decentralized and dealer-based. There is no central exchange, no order book, no uniform pricing. Instead, a network of dealers — primarily banks and investment firms — maintain inventories of securities and stand ready to buy from and sell to customers at quoted prices. A client wanting to buy a security calls a dealer (or several), gets quotes, negotiates, and transacts. Prices differ from dealer to dealer and moment to moment.

OTC products and markets

The OTC market encompasses multiple, largely separate ecosystems:

Bonds. The vast majority of bond trading is OTC. Government bonds, corporate bonds, municipal bonds, and mortgage-backed securities all trade through dealer networks. This market is many times larger than the equity market by dollar volume. A pension fund buying Treasury bonds does not go to a stock exchange; it calls a dealer and negotiates a price.

Currencies. Foreign exchange trading is entirely OTC. Banks trade currencies with each other and with customers through a global dealer network, 24 hours a day across time zones. Daily volume exceeds $6 trillion, vastly larger than any equity market.

Derivatives. Interest-rate swaps, credit default swaps, equity options, and other derivatives trade overwhelmingly OTC. After the 2008 crisis, regulators pushed some derivatives toward centralized exchanges and clearing, but the majority remain OTC. Dealers quote prices and handle the logistics.

Unlisted stocks. Companies not meeting exchange listing standards often trade OTC. In the US, platforms like OTC Markets Group facilitate this trading, though the actual trades are bilateral negotiations between dealers and customers.

Commodities. Physical commodities and commodity derivatives trade heavily OTC, though major commodities also have exchange-traded futures.

Dealers and market makers

The OTC market runs on dealers. A dealer maintains an inventory of securities, quotes bid-ask prices, and earns the spread between buying and selling prices. Dealers serve as intermediaries, allowing customers to transact quickly without waiting for a matching counterparty.

Major dealers in OTC markets include large banks: JPMorgan, Goldman Sachs, Bank of America, Citibank. These banks employ traders who specialize in specific securities or asset classes, maintain inventories, and quote prices throughout the trading day.

Dealers also provide other services: clearing, settlement, financing (repo), and custody. A customer buying a security OTC may ask the dealer to hold it in custody, finance it through repo, or arrange settlement. This bundled service is part of the dealer’s business model.

Pricing and transparency

OTC pricing is far less transparent than exchange pricing. An exchange publishes continuous quotes: the best bid, best ask, and depth of market. An OTC dealer quotes a bid and ask to a single customer, and that quote may not be published.

Trades are not instantaneously reported to the public. In the US, bond trades on FINRA’s TRACE system are reported, but with a 15-minute delay (longer for institutional trades). Many OTC markets have minimal reporting; a trade might not be publicly disclosed for weeks or at all.

This lack of transparency has advantages and disadvantages. Dealers prefer opacity because it allows them to transact at different prices with different customers without being immediately undercut. Customers prefer opacity because it reduces the market impact of large orders — if everyone knew a pension fund was buying a billion dollars of bonds, prices would move against them.

But opacity also facilitates fraud and gives dealers pricing power. A customer shopping the block among multiple dealers is trying to overcome this asymmetry and get better execution.

Bid-ask spreads and transaction costs

OTC spreads are typically wider than exchange spreads. For a liquid bond trading actively, the spread might be $0.25 per $100 of face value (0.25% of price). For an illiquid OTC stock, the spread might be 5% or more. This spread is the transaction cost borne by the customer.

Large trades incur additional costs. A customer buying a million shares of an illiquid stock cannot place a market order and expect execution at the published bid; the customer must negotiate with dealers, and prices will concede significantly to the customer’s size.

Regulation of OTC markets

OTC markets are less formally regulated than exchanges. There is no OTC “exchange” that adopts and enforces rules; instead, dealers are regulated as broker-dealers by the SEC and self-regulatory organizations (FINRA in the US).

Regulations require:

• Fair pricing. Dealers must execute customer orders at prices that are fair and reasonable, not fraudulent or manipulative.
• Disclosure. Dealers must disclose material conflicts of interest and compensation.
• Best execution. Where applicable, dealers must route orders to achieve the best available price.
• Trade reporting. Many (though not all) OTC trades must be reported to trade repositories or regulatory bodies.

After the 2008 financial crisis, regulation tightened. Swaps must now be centrally cleared through clearinghouses. Some derivatives must trade on exchanges. Trade reporting requirements expanded. But the OTC market remains less regulated than exchange trading.

Clearing and settlement

OTC trades can clear bilaterally (between the two parties directly) or through a central clearinghouse. For bonds and equities, clearing is typically centralized: the NSCC (National Securities Clearing Corporation) in the US clears and settles both exchange and many OTC trades.

For derivatives, the practice varies. Some derivatives (standard swaps, many credit derivatives) now clear through central clearinghouses after the 2008 crisis. Bespoke or non-standard derivatives may still clear bilaterally.

Settlement typically occurs T+2 (two business days after trade). Currency trades settle overnight or T+0 (same day).

Advantages and disadvantages

Advantages of OTC markets:

• Customization. Dealers can create bespoke securities tailored to a customer’s needs, rather than trading only standardized instruments.
• Size. Large orders can be transacted without moving prices as much as on an exchange.
• Flexibility. OTC markets operate 24 hours; there is always a dealer somewhere quoting prices.
• Privacy. Large transactions need not be disclosed immediately.

Disadvantages:

• Transparency. Prices and spreads are opaque; customers may not know if they received fair execution.
• Counterparty risk. In bilateral OTC trades, you take credit risk with your dealer.
• Friction. Negotiating with dealers is slower than submitting an order to an exchange.
• Costs. Spreads are typically wider; transaction costs higher.

See also