Markets & structure

Rule 144A Market The US private-placement resale market that allows qualified institutional buyers to trade restricted securities freely without SEC registration.

Russell 2000 Index The Russell 2000 is a market-capitalization-weighted index of 2,000 small-cap US companies. It represents the small-cap segment of the US stock market and is more volatile and less liquid than the S&P 500. It is often used to assess the health of the broader US economy beyond mega-cap stocks.

S&P 500 Index The S&P 500 is an index of 500 of the largest publicly traded US companies, weighted by market capitalization. It is the most widely used benchmark of the overall health of the US stock market and economy. Trillions of dollars are invested in funds tracking the S&P 500.

São Paulo Stock Market Brazil's primary securities exchange and the largest in Latin America, trading equities, bonds, and derivatives for the region.

Seasoned Equity Offering Mechanics How a public company returns to the primary market to issue new shares, typically at a discount to current market price, raising capital from existing and new investors.

Secondary Buyout in Private Equity A secondary buyout occurs when one PE firm sells a portfolio company to another PE firm, bypassing traditional exit routes like IPO or sale to a strategic buyer.

Secondary Market The secondary market is where existing securities trade among investors after their initial issuance. It is the vast, liquid venue where stocks and bonds change hands millions of times daily, and where most investor activity occurs.

Secondary Market for Private Equity: How It Works The secondary market for private equity lets investors buy and sell existing fund stakes, with pricing driven by discount rates and fund performance expectations.

Secondary Market Liquidity: What It Means for Investors How secondary market liquidity affects resale prices, risk premiums, and suitability for different investor types in stocks, bonds, and derivatives.

Secondary Offering vs IPO: What the Difference Means for Shareholders Secondary offerings vs IPO explained: when proceeds go to company vs selling shareholders, and dilution implications for existing investors.

Sector Indices: How GICS and ICB Classify Stocks Learn how sector index definition and classification systems like GICS and ICB assign companies to sectors and drive index composition.

Securities Information Processor A Securities Information Processor (SIP) is a central facility that collects trade and quote data from multiple stock exchanges and over-the-counter markets and disseminates consolidated, real-time market data to the public. The SIP is the source of the official market price.

Securities Lending in Secondary Markets How securities lending works: who borrows shares, what collateral backs the loans, and the role of repo and third-party intermediaries in enabling short selling.

Securities Lending Venue Mechanics How securities lending venues work, including agent lenders, custodians, triparty platforms, and the mechanics of matching and settlement.

Settlement Cycle: What T+1 Means for Stock Trades T+1 settlement means stocks trades settle one business day after execution. Learn how the faster cycle affects cash and share transfers, and why the two-day lag was shortened.

Settlement Obligation The legal and operational requirement to deliver securities or funds to counterparties on the contractual settlement date.

Shanghai Composite Index China's primary stock market index measuring performance of all A-shares listed on the Shanghai Stock Exchange.

Shanghai Stock Market China's largest securities exchange and the primary venue for mainland equity trading.

Shelf Registration An SEC regulatory process that allows companies to register securities in advance and sell them over time whenever market conditions are favorable, without re-filing with regulators.

Shelf Registration vs Traditional Primary Offering Shelf registration lets issuers pre-register securities and sell tranches over time, unlike traditional primary offerings that require full underwriting upfront.

Short Exempt Order Flag A regulatory marker applied to short-sale orders that meet specific exceptions during price-test circuit breaker triggers.

Short Sale Locate Requirement The regulatory obligation for brokers to locate available shares before facilitating a short sale, and what counts as a valid locate.

Single-Dealer Platform A single-dealer platform (SDP) is a private electronic venue operated by a single bank or broker where clients can trade fixed income, currencies, and other instruments. Unlike multi-dealer platforms, SDPs show only that bank's prices and liquidity.

Single-Dealer Platform vs Multilateral Trading Venue Understand how single-dealer platforms differ from multilateral venues: one bank quotes prices versus multiple competing dealers on exchanges and alternative trading systems.

Smart Beta Index Explained Factor-based indices that weight stocks by value, momentum, quality, or volatility instead of market cap—and the trade-offs versus cap-weighted passive.

Sources of Index Tracking Error in Index Funds Why index funds diverge from their benchmark: sampling, costs, dividend timing, and securities lending explain most tracking error.

SPAC vs Traditional IPO: Mechanics and Trade-Offs SPAC vs traditional IPO mechanics, timeline, dilution, and disclosure requirements; how blank-check companies compare to underwritten offerings.

Sponsored Access An arrangement allowing non-member traders to submit orders directly to an exchange under a member's sponsorship and risk controls.

Spoofing and Layering Mechanics The manipulation tactic of placing and rapidly cancelling large fake orders to move prices and trigger reactions from other market participants.

Spoofing vs Layering: Market Manipulation Explained Spoofing and layering are illegal order-book manipulation tactics. Learn how they differ, how regulators detect them, and why the Dodd-Frank Act criminalized both.

Spot Market vs Futures Market: Key Differences Understand the key differences between spot market and futures market trading, from settlement timing to price discovery and hedging mechanics.

Stock Connect Programs Trading links between Hong Kong and mainland China exchanges that allow cross-border equity access via quota systems and designated brokers, bypassing direct foreign investment restrictions.

Stock market The stock market is the network of exchanges, brokers, market makers, and traders through which shares of public companies change hands. It is both a physical ecosystem (exchanges, trading firms) and an information system (prices, indices, news). It is not the economy.

STOXX Europe 600 The pan-European equity benchmark covering large, mid, and small-cap stocks across 17 countries, anchored by the Eurozone.

Survivorship Bias in Stock Indices Learn how survivorship bias in stock indices understates risk and overstates returns by excluding companies that failed or were delisted.

Swap Execution Facility A Swap Execution Facility (SEF) is a regulated trading venue where standardized derivatives (interest-rate swaps, credit default swaps, currency swaps) must be executed. SEFs were created after the 2008 financial crisis to bring transparency and standardization to derivatives trading.

Swap Execution Facility: How SEFs Work A swap execution facility (SEF) is a Dodd-Frank mandated trading venue where standardized swaps are executed, combining electronic order books and request-for-quote matching.

Systematic Internaliser A MiFID II regulatory classification for dealers who trade on own account against clients systematically and at frequency.

T+1 Settlement Mechanics How T+1 settlement mechanics compress the trade-to-delivery timeline from two days to one, and what that means for confirmations, funding, and securities transfers.

T+1 vs T+2 Settlement Across Global Markets How settlement cycles differ across major stock exchanges and the cash flow and operational risk implications for cross-border traders.

Tender Offer vs Secondary Offering Tender offer vs secondary offering: the structural difference between a company buying back shares and an issuer or insider selling shares.

Tertiary Market The tertiary market is the trading market for restricted securities, typically shares held by insiders or subject to resale restrictions. It allows restricted shares to be traded before their lockup period expires, though with limited participants and tight regulation.

The Korea Discount and Chaebol Valuation Why Korean equities trade at a persistent valuation gap relative to global peers and how governance factors drive the discount.

Thematic Index Methodology: How Trend-Based Indices Are Constructed How index providers define investment themes, screen stocks, manage concentration, and build thematic indices that capture structural shifts like AI, clean energy, and aging populations.

Thin Market A market with too few participants or trades to absorb normal transaction sizes without significant price impact; characterized by wide spreads and low volume.

Third Market Trading: Exchange-Listed Stocks OTC The third market in finance is over-the-counter (OTC) trading of exchange-listed securities by broker-dealers outside the official exchange. It remains relevant for block trades and after-hours activity.

Tick Size and Its Effect on Trading How minimum tick increments affect bid-ask spreads, liquidity, and market efficiency. Tick size varies by price and security type.

Tick Size and Market Quality How the minimum price increment for a security influences bid-ask spreads, liquidity provision, and overall trading costs.

Tick Size Regime How minimum price increments change market structure, liquidity, and trading mechanics.

Tokyo Stock Market Japan's primary equity exchange and the mechanisms that govern trading in Japanese equities.

Toronto Stock Market Canada's largest stock exchange and a key global hub for natural resources and commodity equities.

Total Return Index vs Price Index How total return indices reinvest dividends, creating vastly different long-term performance from price-only indices tracking the same basket.

Trade Reporting Facility Systems operated by FINRA where brokers must report equity trades executed off the lit exchanges.

Trade Reporting Facility Explained How FINRA Trade Reporting Facilities work, which trades must be reported, and how off-exchange prints feed into the consolidated tape.

Trade-Through Protection A Regulation NMS requirement that brokers must route orders to execute at the best available price across venues rather than at an inferior price locally.

Trading Halt vs Trading Suspension: Key Differences Learn the difference between a trading halt (temporary pause before news) and a trading suspension (forced removal from trading), typical durations, and investor implications.

Trading Holiday Effects Across Global Markets How stock exchange closures affect volume, pricing, and arbitrage opportunities on markets that remain open.

Treasury Securities Auction Venue How the U.S. Treasury auctions bills, notes, and bonds to the public through TreasuryDirect and the Federal Reserve—including competitive and non-competitive bidding.

TSX Composite Index Canada's primary stock market benchmark, tracking the largest publicly traded companies on the Toronto Stock Exchange.

Two-Sided Market (Finance) Platform business model in which an exchange or venue must simultaneously attract buyers and sellers; network effects and switching costs drive profitability.