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Glossary

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S2S integration

S2S integration is direct server-to-server data exchange that improves accuracy, security, and attribution for mobile apps via APIs.

Satoshi Test: Meaning & How It Works

A Satoshi Test is a legitimate on-chain check exchanges use to verify wallet ownership. Read about how it works, typical amounts, and if it's safe.

Scalability

Scalability refers to the ability of a system, network, or process to handle a growing amount of work or its potential to accommodate growth.

Scheduled Settlement

Scheduled settlement is the agreed timeline to transfer funds or securities, covering the settlement schedule, SEC oversight, and reduced risk.

Seamless Payments: Meaning, How It Works, and Examples

Seamless payments meaning, how they work, the components behind a low-friction checkout, and examples across web, in-store, and mobile.

Secondary Market

Secondary market: where investors trade issued securities like stocks, bonds and crypto, providing liquidity and price discovery on exchanges and OTC.

Secret key

Secret key: a confidential value for symmetric encryption that encrypts and decrypts data. It contrasts with public/private keys and key management basics.

Security Protocols

Security protocols are rules that secure data and communications via encryption and authentication across OSI layers, including TLS, IPsec, and HTTPS.

Security Token Offering

Security Token Offering (STO): a regulated fundraising method issuing blockchain-based tokens that represent ownership in assets like equity and debt.

Seed Phrase

Seed phrase: a 12-24 word recovery phrase generated by crypto wallets to restore access to funds; keep it private and secure to protect assets.

Self-balancing Liquidity Mechanisms

Self-balancing liquidity mechanisms are strategies and tools that align liquid and illiquid assets to stabilize cash flow and meet obligations.

Semantic Web

Semantic Web: an extension of the web that makes data machine-readable and linkable using RDF, OWL and SPARQL, enabling interoperable knowledge sharing.

Sepa Instant

SEPA Instant is a euro instant credit transfer scheme enabling real-time payments across SEPA in seconds, 24/7, with limits up to €100,000.

Series B Funding

Series B funding is the venture capital round after Series A to scale operations and enter new markets, led by venture capital and private equity firms.

Service Mesh

A service mesh is an infrastructure layer for microservices that manages service-to-service traffic, security, and observability via sidecar proxies.

Session Management

Session management is the control of user state in web apps, handling authentication, tokens, and timeouts to secure, track, and persist interactions.

Session persistence

Session persistence is a load-balancing technique that keeps a user's requests on the same server during a session, maintaining state and a consistent UX.

Settlement Bank

A settlement bank is a financial institution that finalizes transactions by clearing and transferring funds between banks within payment systems

Settlement latency

Settlement latency is the delay between trade execution and final settlement, driving costs and liquidity risk; DLT helps cut delayed settlement.

Settlement mechanism

A settlement mechanism is a structured process to resolve WTO trade disputes, guided by the Dispute Settlement Body and the Appellate Body.

Settlement risk

Settlement risk is when a counterparty fails to deliver funds or securities at settlement, often in FX; mitigated by PvP, CLS, netting and collateral.

SHA-256

SHA-256 is a 256-bit cryptographic hash function in the SHA-2 family, securing data integrity, digital signatures, HTTPS, and the Bitcoin network.

Shadow Order Book

A shadow order book is a private or hidden record of buy and sell orders for a financial asset, typically maintained by a trading platform or exchange.

Shareholder

Shareholder definition: an individual or entity owning company shares with voting or dividend rights, plus common vs preferred and limited liability.

Shitcoin

Shitcoin definition: a cryptocurrency with little value or real use, typically lacking solid tech or community; consider high risk.

Short squeeze

Short squeeze: a rapid price surge that forces short sellers to buy shares to cover, amplified by high short interest and long days to cover.

Sidechain

A sidechain is a separate blockchain linked to a parent chain by a two-way peg, enabling asset transfers and scaling with faster, cheaper transactions.

Side Channel Attack

A side channel attack exploits physical leaks—power, timing, electromagnetic, cache or acoustic—to infer cryptographic keys, with key mitigations.

Simulation Environment

A simulation environment is a virtual setup that replicates real-world scenarios for training, testing, and research in a safe, controlled space.

Single-Dealer Platform (SDP): Definition and Key Features

A single dealer platform (SDP) is an electronic trading system run by one dealer, integrating pricing, liquidity, risk controls, and post-trade services.

Single Euro Payments Area (SEPA)

Single Euro Payments Area (SEPA) is the EU framework that harmonises euro payments across 36 countries; also covers US State Environmental Policy Act.

Slippage control

Slippage control is the practice of minimizing the gap between expected price and execution price using limit orders, timing, and tolerance settings.

Slippage Control Algorithms

Slippage control algorithms are computational methods designed to minimize the difference between the expected and actual execution prices of trades in financial markets.

Slippage-free routing protocols

Slippage-free routing protocols are advanced network communication methods designed to ensure data packets are transmitted across a network without delays or losses.

Slippage-free Token Swaps

Slippage-free token swaps refer to cryptocurrency transactions where tokens are exchanged without any price discrepancy between the expected and actual execution prices.

Slippage Prediction Models

Slippage prediction models are tools that forecast the gap between expected and executed trade price and predict wheel slip in markets and vehicles.

Slippage Tolerance Mechanisms

Slippage tolerance is the maximum price deviation a trader accepts between expected and executed trades, managed via settings common in DeFi DEXs.

Smart Collateral Management Tools

Smart collateral management tools are automated systems that optimize collateral, reduce risk, improve capital efficiency, and support compliance.

Smart Contract Audit

Smart contract audit: a comprehensive review of smart contract code to find vulnerabilities, verify functionality and compliance, and strengthen security.

Smart money

Smart money is capital managed by institutional investors and market pros with deep insight, influencing trends and guiding informed investing.

Smart order router

Smart order router (SOR): an algorithm that routes orders across venues for best execution and lower fees, a process known as smart order routing.

Smart Order Routing (SOR)

Smart order routing (SOR) is an automated system that routes trades across venues using real-time data to secure best price execution and lower costs.

Snapshot

Snapshot is a point-in-time copy of system data and settings used for fast backup, testing, disaster recovery, and migration in VMs and cloud.

Soft Cap

Soft cap launch meaning: the minimum ICO funding target to proceed with development; flexible versus a hard cap’s strict maximum in token sales.

Soft Peg

Soft peg: an exchange rate regime where a currency tracks a reserve currency within a narrow band, balancing stability and flexibility in fiat and crypto

Sort Code

Sort code: a six-digit UK bank identifier for specific branches, used with an account number to route domestic payments like transfers and direct debits.

Spot Liquidity Optimization

Spot liquidity optimization is managing assets for immediate spot-market execution, using market makers, limit orders, and order-flow analysis.

Spot Market

Spot market: a market where crypto and other assets are traded for immediate delivery at current prices, with ownership transferred on settlement.

Spot Trading: Definition and How It Works

Spot trading is buying or selling an asset for immediate delivery at the current market price. How spot trading works in crypto and how it differs from futures.

Spread optimization

Spread optimization is managing the bid-ask difference to maximize returns and minimize transaction costs, using algorithms to manage spread dynamically.

Spread Widening: What It Means When Credit Spreads Widen

What it means when credit spreads widen: the drivers, widening vs. tightening, and the impact on bond prices, liquidity, and funding costs.

SSL and TLS Encryption

SSL/TLS encryption is a set of cryptographic protocols that secures data in transit with a handshake, certificates, and public and symmetric keys.

Stablecoin Liquidity Farming

Stablecoin yield farming is providing stablecoins to DeFi liquidity pools for rewards, while managing risks like impermanent loss and smart contracts.

Stablecoin peg

Stablecoin peg: the mechanism that keeps a stablecoin's price tied to a reference asset like the US dollar, using reserves, collateral, or algorithms.

Stablecoin Rebalancing Protocols

Stablecoin rebalancing protocols are mechanisms that adjust supply and liquidity to keep pegs stable, using algorithms and market makers in DeFi.

Stablecoin reserve

Stablecoin reserve: assets held by an issuer to back a stablecoin's value, maintain its fiat peg, enable redemption, amid evolving regulation.

Stablecoin volatility

Stablecoin volatility is the degree of price fluctuation in stablecoins, driven by liquidity, market stress, and regulation across designs.

Stable Swap Protocols

Stable swap protocols are DEX mechanisms for low-slippage swaps between like-valued assets like stablecoins, using curves to maintain tight price bands.

Stagflation

Stagflation is when high inflation, stagnant growth, and rising unemployment occur together, with causes, 1970s context, and policy responses explained.

Staking Collateral Liquidity Strategies

Staking collateral liquidity strategies use liquid staking to keep assets tradable to earn yield, via liquid staking tokens, pools, and risk management.

Staking Collateral Risks

Staking collateral risks are losses from slashing, smart contract bugs, and using staked assets as collateral for trading or in liquid staking.

Staking Pool Liquidity Risks

Staking pool liquidity risks are the chance staked assets can't be exited quickly without loss, driven by liquidity, volatility, and liquid staking risks.

Staking Yield Dynamics

Staking yield dynamics: the factors shaping staking returns in PoS networks—block rewards, fees, staking ratios, token issuance, and liquid staking risks.

State Synchronization

State synchronization is the process of keeping multiple systems consistent and up to date across networks and distributed systems.

Stochastic Liquidity Modeling

Stochastic liquidity modeling is a probabilistic framework to assess liquidity risk and price assets, factoring in bid-ask spreads and option valuation.

Store of value

Store of value: an asset, commodity, or currency that preserves purchasing power over time, from gold and real estate to fiat money and Bitcoin.

Supercycle

A supercycle is an extended period of strong growth in demand for commodities, often driven by structural changes in the global economy, leading to sustained high prices.

Swap Fee Optimization

Swap fee optimization is reducing the swap fee in trading by choosing fee structures, timing positions, and venues to cut rollover costs and lift returns.

Swift

SWIFT is the global bank-to-bank messaging network for secure, standardized cross-border payment instructions; it does not move money.

Swing trading

Swing trading is a short- to medium-term strategy holding positions for days to weeks to capture price swings using support/resistance and key indicators.

Sybil Attack

A Sybil Attack is a security threat where one entity creates multiple fake identities to gain disproportionate influence in a network.

Symmetric key cryptography

Symmetric key cryptography uses one shared secret for encryption and decryption, delivering fast, efficient data protection, including AES.

Synthetic Asset

Synthetic asset: a tokenized instrument that tracks an underlying asset via smart contracts or derivatives, giving exposure without direct ownership.

Synthetic Asset Market Depth

Synthetic asset market depth is the measure of liquidity in synthetic asset markets, indicating how large orders can be filled with minimal price impact.

Synthetic Collateral Token

A synthetic collateral token is a DeFi asset minted by smart contracts to mirror asset prices and serve as collateral, enabling exposure without ownership.

Synthetic Liquidity Future

Synthetic liquidity future: a derivative using synthetic assets to track prices, widening market access while carrying volatility and regulatory risks.

Synthetic Liquidity Market

A synthetic liquidity market uses derivatives to create asset exposure without ownership, enabling synthetics in trading and DeFi access.

Synthetic Token Arbitrage

Synthetic token arbitrage is exploiting price gaps between synthetic tokens and underlying assets across markets; includes mechanics, risks, liquidity.

Synthetic Token Liquidity

Synthetic token liquidity is the ease of trading synthetic assets on DeFi with minimal price impact, enabled by smart contracts, pools and DEXs.

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