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Glossary

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Paper trading

Paper trading is simulated trading with virtual money to practice strategies risk-free using live market data and orders before going live in real markets.

Paper Wallet

A paper wallet is an offline physical document holding a public address and private key for cold storage of crypto; includes creation, storage, and risks.

Parachain

Parachain: a specialized blockchain on Polkadot or Kusama that runs parallel to the relay chain, gaining shared security and interoperability.

Payee: What Is It + Examples

Payee: the person or entity that receives a payment in a transaction, from bills to checks and benefits, including SSA representative payees.

Payment Gateway

Payment gateway: a secure system that transmits card and wallet data between merchants, bank payment gateway providers, and processors for approval.

Payment Orchestration

Payment orchestration is centralized management of payments across providers to optimize routing, improve acceptance, reduce costs, and enhance security.

Payment Processor

Payment processor: a service that securely authorizes, routes, and settles card and digital payments between customers and merchant accounts.

Payment rails

Payment rails are the networks that move money between accounts, including ACH, wire, RTP and card networks for domestic and cross-border payments.

Payment Reference: What It Means When Sending Money

What a payment reference means when sending money, what to write in the reference field, and how it differs from a bank-generated reference number.

Payment Routing

Payment routing is the process of directing a transaction via PSPs and acquirers to the optimal path, improving approval rates while reducing fees.

Payment Service Provider (PSP)

A payment service provider (PSP) processes payments for merchants, connecting to banks to enable multiple payment methods, security and global reach.

Payment Services Directive 2 (Psd2)

PSD2 open banking regulations require banks to offer secure API access to TPPs with consent, mandate SCA, and strengthen consumer protection in the EU.

PCI DSS Compliance: Definition, Requirements, and Levels

PCI DSS compliance: what it is, who must comply, core requirements, validation levels (SAQ, ROC, AOC), and how it's maintained between assessments.

Peer-to-peer lending

Peer-to-peer lending connects borrowers and individual lenders via online platforms, bypassing banks, offering competitive rates and notable risks.

Peer-to-peer networking

Peer-to-peer networking is a decentralized model where peers share resources, enabling file sharing, gaming and blockchain, with key challenges.

Peer to peer (p2p)

Peer-to-peer (P2P) is a decentralized network in which peers have equal roles, sharing files and data directly without relying on a central server.

Pegged currency

A pegged currency is a type of currency whose value is directly tied or fixed to another currency, a basket of currencies, or a measure of value, such as gold.

Peg stability

PEG stability is PEG's ability to stabilize proteins; PEG stability assessment weighs molecular weight, ethylene glycol level, and PEGylation site.

Pending Balance: What It Means and How It Affects Your Account

What a pending balance means, whether pending transactions are included in your available or current balance, and how long transactions stay pending.

Permissionless

Permissionless: in a permissionless blockchain, anyone may join and validate transactions without central approval, enabling decentralization.

Perpetual contracts

Perpetual contracts are derivatives with no expiration, letting traders hold positions indefinitely; funding rates keep perpetual futures near spot.

Perpetual futures

Perpetual futures are derivatives with no expiration, tracking spot via a funding rate, used in crypto to speculate, hedge, or arbitrage with leverage.

Persistent Connections

Persistent connections are HTTP keep-alive features that keep one client-server connection open for multiple requests, reducing latency and resource use.

Phone phishing

Phone phishing (vishing) is a scam using calls or texts to steal personal and financial data. Covers common tactics, caller ID spoofing, and prevention.

Pipelining Requests

HTTP pipelining is an HTTP/1.1 technique that sends multiple requests over one persistent TCP connection without waiting, reducing latency and overhead.

Ponzi scheme

A Ponzi scheme is investment fraud that pays earlier investors with new money. Understand its mechanics, red flags, and why it inevitably collapses.

Portfolio management

Portfolio management is selecting and diversifying investments to meet goals, aligning asset allocation with risk tolerance and regular rebalancing.

Position Size

Position sizing is how many units to trade, set by risk per trade and stop-loss distance. Includes formula, example, and common mistakes.

Post-Only Limit Order: What It Is and How It Works

A post-only limit order posts to the book as maker or cancels, never taking. How it works, maker vs. taker fees, and how it differs from IOC and FOK.

Post trade process

Post-trade process: activities after execution—trade confirmation, clearing and settlement—that finalize transfer and reduce counterparty risk.

Prediction Markets: How They Work and What They Forecast

A prediction market is a market where participants trade contracts based on future events. Learn how prediction markets work and what they can forecast.

Prepaid Card

A prepaid card is a preloaded payment card not tied to a bank account, with no credit checks. Spend only the balance; widely accepted.

Pre sale

Pre sale is a special period when event tickets are offered to members or code holders before general release, giving earlier access and better seats.

Price Discovery: Meaning, Mechanisms, and Examples

What price discovery means, how exchange and OTC mechanisms set prices, the factors that influence them, and where discovery breaks down.

Price impact

Price impact is the change in an asset's price caused by a trade. Understand liquidity, slippage, trade sizing, and tactics to minimize its effect.

Private Blockchain

A private blockchain is a type of blockchain network that restricts access to authorized participants, ensuring enhanced privacy and control over data and transactions.

Private transactions

Private transactions are deals to take a public company private, typically via buyout, with safeguards from independent directors and SEC filings.

Processing Currency

Processing currency is the system for multi-currency payment processing—acceptance, conversion, settlement—covering gateways, processors, rates and fees.

Processing Time

Processing time is the duration an authority takes to review and complete an application, from receipt to decision; see factors, checks, and tips.

Profit and loss statement

Profit and loss statement: a report summarizing revenue, COGS, operating expenses, and net profit over a period to assess performance and profitability.

Programmability

Programmability is a blockchain's ability to run code via smart contracts, enabling programmable money, automation, DEXs, and Bitcoin DeFi.

Proof of Address (PoA)

Proof of address verification (PoA) confirms a person's residence using utility bills, bank statements or leases, with checks for AML compliance and fraud.

Protocol buffers

Protocol buffers (Protobuf) are Google's language- and platform-neutral system for serializing structured data to a compact, fast binary format.

PSP Integration

PSP integration connects a business's payment system to a Payment Service Provider to enable secure, multi-method online payments and smoother checkout.

Public Address

A public address is a shareable cryptocurrency identifier derived from a wallet's public key, used to receive funds without exposing the private key.

Public blockchain

Public blockchain: a decentralized, transparent ledger anyone can join to validate transactions via PoW or PoS, exemplified by Bitcoin and Ethereum.

Public key cryptography

Public key cryptography is an asymmetric system using a public/private key pair for encryption, decryption, and digital signatures in secure communication.

Public Sale

A public sale is an event where goods or assets are sold openly to the general public, often through an auction or direct purchase, allowing anyone to participate.

Put option

A put option is a contract giving the right, not the obligation, to sell an asset at a set strike price before expiry, for hedging or bearish speculation.

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