- S Corporation (S Subchapter)
- S&P 500 Dividend Aristocrats
- S&P 500 Dividend Aristocrats Index
- S&P 500 Index (Standard & Poor's 500 Index)
- S&P Case-Shiller HPI
- S&P High Yield Dividend Aristocrats Index
- S&P500 Index Future
- S2
- S3
- S4
- Safe Deposit Box
- Safe Harbors
- Safe Haven
- Sale
- Sales and Purchase Agreement (SPA): What It Is, With Examples
- Sales Lead
- Sales Tax
- Sallie Mae (SLM)
- Salvage Value
- Sampling
- Scalability
- Scalp Trading
- Scalping
- Scarcity
- Scenario Analysis
- Schedule 13D: What It Is, How to File, Requirements, Example
- Schedule 13G
- Schedule K-1 Federal Tax Form: What Is It and Who Is It For?
- Scope
- Scrips
- Seasonality
- Seasonally Adjusted Annual Rate (SAAR)
- SEC Form S-1: What It Is, How to File It or Amend It
- SEC Regulation D (Reg D): Definition, Requirements, Advantages
- SEC Release IA-1092
- SEC Yield
- Second World
- Secondary Market
- Section 1231 Property: Definition, Examples, and Tax Treatment
- Section 1245
- Shadow Banking System
- Shadow or Wick
- Shadow Pricing
- Share Certificate
- Share Class
- Share of Wallet (SOW)
- Share Repurchase
- Shareholder
- Shareholder Activist
- Shareholder Equity (SE)
- Sierra Leonean Leone SLL
- SIFMA Rec. Early Close
- Signature Loan
- Silent Partner
- Silk Route
- Silo Mentality
- Simple Agreement for Future Tokens (SAFT)
- Simple Interest
- Simple Moving Average (SMA)
- Simple Moving Average SMA
- Skewness
- Skin in the Game: Meaning, Example, and SEC Rules
- Skirt Length Theory
- Slippage
- Small and Mid-size Enterprise (SME)
- Small Business Administration (SBA)
- Small Caps
- Small-Cap
- Smart Beta
- Smart Beta ETF
- Smart Contracts
- Smart Money
- Smoot-Hawley Tariff Act
- Smurf
- Social Audits
- Social Economics
- Social Enterprise
- Social Entrepreneur
- Social Justice
- Social Media
- Social Networking
- Social Responsibility
- Social Sciences
- Social Security
- SPDR S&P 500 ETF (SPY)
- SPDR S&P Dividend ETF (SDY)
- Special Drawing Rights (SDR)
- Special Economic Zones (SEZ)
- Special Opening Quotation (SOQ)
- Special Power of Attorney
- Special Purpose Acquisition Company (SPAC)
- Special Purpose Vehicle (SPV)
- Special Warranty Deed
- Specialization
- Sri Lankan Rupee LKR
- Stable Value Fund
- Stagflation
- Stagnation
- Stakeholder
- Stalking-Horse Bid
- Standard & Poor's (S&P)
- Standard & Poors S&P500 Equity Index $SPX
- Standard Deduction
- Standard Deviation
- Standard Error
- Subjective Probability
- Sublease
- Subordinated Debt
- Subordination Agreement
- Subprime Loan
- Subprime Mortgage
- Subprime Mortgage Lending
- Subrogation
- Subscription Agreement
- Subsidiary Rights
- Swap
- Swap Execution Facility (SEF)
- Swap Rate
- Swaption (Swap Option)
- Swazi Lilangeni SZL
- Sweat Equity
- Swedish Krona SEK
- Sweep Account
- Swing Trading
- Swingline Loan
- Symmetrical Distribution
- Symmetrical Triangle
- Syndicate
- Syndicated Loan
- Synergy
- Synthetic
- Syrian Pound SYP
- Systematic Investment Plan (SIP)
- Systematic Sampling
- Systemic Risk