Banking Glossary

Navigating savings accounts, CDs, money market accounts and other deposit products can feel like learning a new language. This glossary provides clear, concise definitions for essential banking terms so you can compare options with confidence.

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Rates & Yields

Account Types

High-Yield Savings Account (HYSA): An interest-bearing deposit account that pays a markedly higher rate than the national average for standard savings. Online banks typically offer rates 10–20x the national average, while preserving daily liquidity and FDIC or NCUA insurance protection.
Certificate of Deposit (CD): A time deposit that locks your money at a fixed interest rate for a set term (typically 3 months to 5 years). CDs generally pay higher rates than savings accounts in exchange for less liquidity. Withdrawing before maturity triggers an early withdrawal penalty, usually 60–365 days of interest depending on the term.
No-Penalty CD: A certificate of deposit that allows full withdrawal after a brief initial period (typically 6–7 days) with no early withdrawal penalty. No-penalty CDs offer slightly lower rates than standard CDs, typically 25–75 basis points less, in exchange for added flexibility.
Brokered CD: A certificate of deposit purchased through a brokerage rather than directly from a bank. Brokered CDs can be traded on a secondary market before maturity (at a gain or loss), offer access to rates from many banks in one place, and are still FDIC-insured up to $250,000 per issuing bank. Some may be callable, meaning the issuing bank can redeem them early.
Money Market Account (MMA): An FDIC- or NCUA-insured deposit account that may include check-writing or debit card access. Created by the Garn-St Germain Act of 1982 to help banks compete with money market funds, MMAs are legally a subcategory of savings deposits. The historical rate premium over savings accounts has largely disappeared at online banks; the main differentiators are access features and sometimes higher balance requirements. Not to be confused with money market funds, which are uninsured investments.
Money Market Fund (MMF): An SEC-regulated mutual fund that invests in short-term government or corporate debt and aims to maintain a stable $1.00 share price. With over $7 trillion in assets, MMFs compete directly with HYSAs for cash allocations. Unlike money market accounts, MMFs are not FDIC-insured and can theoretically lose value. Despite the similar name, the two are fundamentally different products.
Term Length: The fixed period you agree to keep money in a CD before it matures, typically ranging from 1 month to 5 years. Longer terms generally offer higher rates in exchange for locking up your funds. Withdrawing before the term ends triggers an early withdrawal penalty, usually measured in days of interest (e.g., 90–365 days depending on the term).
Early Withdrawal Penalty: The fee a bank charges when you withdraw funds from a CD before its maturity date, typically expressed as a number of days’ worth of interest (e.g., 90 days for a 1-year CD, 365 days for a 5-year CD). The penalty can eat into your principal if the CD hasn’t earned enough interest to cover it.
Cash Management Account (CMA): A deposit product, typically offered by fintechs or brokerages, that sweeps your cash across multiple FDIC-insured partner banks to provide coverage well beyond the standard $250,000 limit. Some CMAs offer millions in FDIC coverage per individual, making them especially relevant for high-balance depositors.
Treasury Bill (T-bill): Short-term U.S. government debt with maturities of 4, 8, 13, 17, 26, or 52 weeks, sold at a discount to face value. T-bill interest is exempt from state and local income tax, a meaningful advantage over HYSAs in high-tax states even when nominal yields are similar. T-bills carry the full faith and credit of the U.S. government and are widely considered the safest cash instrument available.
I Bond (Series I Savings Bond): A U.S. Treasury savings bond whose yield combines a fixed rate (set at purchase, locked for the bond’s 30-year life) and an inflation rate that resets every six months based on CPI-U. Limited to $10,000 per Social Security number per year electronically, can’t be redeemed in the first 12 months, and forfeits 3 months of interest if cashed before 5 years. Interest is exempt from state and local income tax and federal tax is deferred until redemption.
Cash Sweep Account: A brokerage’s default holding place for uninvested cash. Most large brokerages sweep to affiliated bank deposit programs paying near-zero rates while keeping the spread; some default to a money market fund instead. The yield gap between a default bank sweep (e.g., Schwab at 0.05%) and a competing money market fund in the same brokerage (e.g., Fidelity SPAXX) can exceed 400 basis points, making the default a major hidden cost for inattentive investors.

Deposit Insurance & Safety

FDIC Insurance: Federal protection covering deposits up to $250,000 per depositor, per bank, per ownership category, safeguarding funds if the bank fails. Credit union deposits receive equivalent coverage through the NCUA Share Insurance Fund.
FDIC Average: The national average deposit rate published quarterly by the FDIC, calculated from data reported by all FDIC-insured institutions. It reflects the rate a typical saver earns, historically far below what online banks and credit unions offer. The FDIC also publishes a National Rate Cap, set at the higher of the national average plus 75 basis points or 120% of the current federal funds rate.
National Rate Cap: The maximum interest rate that less-than-well-capitalized banks may offer on deposits, as defined by the FDIC. Calculated as the higher of the national average rate plus 75 basis points or 120% of the current federal funds rate. Well-capitalized banks are not bound by this cap, but it serves as a useful benchmark for how far above average the top rates are.
FDIC or NCUA Insured: Deposit protection backed by the full faith and credit of the U.S. government, up to $250,000 per depositor, per institution, per ownership category. Banks carry it through the FDIC. Credit unions carry the equivalent through the NCUA Share Insurance Fund. The limit and the federal backing are the same in both.
NCUA Insurance: Federal deposit protection for credit unions, provided by the National Credit Union Share Insurance Fund (NCUSIF). Coverage mirrors FDIC insurance: $250,000 per depositor, per credit union, per ownership category, backed by the full faith and credit of the U.S. government. No insured credit union member has ever lost insured deposits. A small number of state-chartered credit unions carry private insurance instead, which is worth verifying before you deposit.

Access & Transfers

Liquidity: How quickly and cheaply you can turn the balance into spendable cash. HYSAs are highly liquid because withdrawals typically settle within 0–2 business days.
Withdrawal Limit: A federal rule once limited savings accounts to six transfers per month, but the Fed permanently removed that cap in 2020. Some banks still enforce voluntary limits on outbound transfers or daily dollar amounts. Check your account terms.
Transaction Limits: Beyond withdrawals, banks may set caps on the number or dollar amount of transactions, such as daily mobile-deposit or transfer limits.
ACH Transfer: An electronic funds-transfer system used to move money between bank accounts, common for direct deposits, bill payments and funding HYSAs.
Wire Transfer: A faster but more expensive method of moving funds electronically, typically for large, urgent transfers. HYSAs may accept incoming wires but often charge for outgoing ones.
External Account Linking: Connecting your HYSA to accounts at other financial institutions to enable transfers in and out; usually verified with micro-deposits.
Deposit Switching Costs: The real and perceived costs of moving your banking relationship to a new institution: redirecting direct deposit, updating automatic bill payments, re-establishing ACH connections, and waiting for transfers to settle. These friction costs are the main reason most consumers accept below-market deposit rates instead of switching to a higher-yielding account, even when they say they'd like to.
Overdraft Protection: A service that prevents your HYSA from going negative by automatically pulling funds from a linked account. Most HYSAs don’t offer it, because they’re designed to stay positive.

Fees & Requirements

Minimum Deposit: The smallest amount required to open the account. Many online-only banks set this between $0 and $100.
Minimum Balance: The lowest account balance you must maintain to earn the advertised APY. If your balance drops below this threshold, the bank may pay a lower rate or no interest at all. Not the same as the minimum deposit, which is what’s needed to open the account.
Maintenance Fee: A monthly charge some institutions levy if your balance or activity falls below set thresholds. Rare among leading online HYSAs; legacy banks may charge $1–$10 per month.
Account Closure: Formally terminating your HYSA. Some banks charge a fee if you close it within a set period (e.g., 90 days), and accrued but un-credited interest may be forfeited.
Deferred Interest: A promotional credit card feature where interest accrues silently during a 0% introductory period but is charged retroactively on the entire original balance if any amount remains unpaid when the period ends. Common on store and medical credit cards (e.g., CareCredit). Unlike a true 0% APR promotion, deferred interest can result in charges far exceeding the original balance.

Account Management

Online Banking: The web interface for managing your HYSA: viewing balances, initiating ACH transfers, downloading statements and more.
Mobile App: The bank’s smartphone app that offers account management plus push alerts, biometric login, mobile check deposit and budgeting tools.
Automated Transfer: A scheduled, recurring move of money, often from checking to HYSA, to "pay yourself first," maintain minimum balances or build savings toward a goal.
Account Statements: Periodic summaries of your HYSA activity: deposits, withdrawals, interest earned and fees. Usually delivered electronically, with paper statements available for a fee.
Statement Cycle: The recurring period (typically monthly) over which your bank tracks account activity before generating a statement.
Account Alerts: Email, SMS or push notifications that keep you updated on deposits, withdrawals, low balances or interest payments. You choose which alerts and channels you want.

Strategies & Concepts

Emergency Fund: Three-to-six months of living expenses parked in an HYSA to cover unforeseen costs without tapping higher-risk investments.
Savings Goal: A target amount earmarked for a future need (e.g., a down payment). Many HYSAs let you create sub-accounts or “buckets” to track each goal separately.
CD Ladder: A strategy that spreads deposits across CDs with staggered maturity dates (e.g., 1-year, 2-year, 3-year). As each rung matures, you reinvest at the longest term, maintaining regular access to a portion of your funds while capturing longer-term rates. Laddering saw renewed consumer interest during the 2023–2024 rate peak as a way to lock in elevated yields.
Inflation Risk: The possibility that rising consumer prices outpace your APY, eroding real purchasing power even as the nominal balance grows.

Regulation & Market Structure

Regulation DD / Truth in Savings Act: The federal regulation (12 CFR Part 1030) requiring banks to disclose APY, interest rates, fees, and account terms in a standardized format. It mandates how APY is calculated, what must appear in advertisements, and what notice banks must give before changing terms. Implemented by the CFPB; credit unions fall under a parallel NCUA rule (12 CFR Part 707).
HHI (Herfindahl-Hirschman Index): A measure of market concentration calculated by squaring each bank’s market share in a local area and summing the results. Higher HHI means fewer competitors, which research links to lower deposit rates for consumers. The DOJ and Federal Reserve use HHI to evaluate whether bank mergers would harm competition.
Direct Bank: A bank that operates without physical branches, serving customers entirely through digital channels (website and mobile app). Direct banks typically offer higher deposit rates than branch-based banks because they avoid the overhead of maintaining a branch network. Also called an online bank or internet bank. Examples include Ally Bank, Marcus by Goldman Sachs, and Synchrony Bank.
Brokered Deposit: A deposit placed at a bank through a third-party intermediary (a deposit broker) rather than directly by the customer. Brokered deposits allow banks to gather funds from outside their local market and let depositors access higher rates, but they carry higher FDIC assessment costs and regulatory restrictions for banks that aren’t well-capitalized. Many high-yield savings accounts and deposit marketplace products rely on brokered deposit arrangements.
Call Report: The Consolidated Report of Condition and Income, which every FDIC-insured bank must file with its regulator each quarter. It reports the bank’s assets, deposits, interest expense and income under instructions that are the same for every filer, and the FDIC publishes it. A figure taken from a call report is therefore the bank’s own filing, and not an advertisement. Call report data is as reported, and a bank can amend an earlier quarter in a later filing.
Interest-Bearing Deposits: The deposit accounts at a bank that earn interest for the customer: savings, interest checking, money market accounts, CDs, most business deposit accounts and brokered deposits. A bank reports the total balance of these accounts each quarter in its call report, together with the interest expense that it recorded on them. Those two figures give the average rate the bank paid on its deposits for the quarter. A bank pays interest only on this part of its deposit base.
Non-Interest-Bearing Deposits: Deposit accounts that earn no interest, usually basic checking accounts and business operating accounts. These balances cost the bank nothing in interest, so a bank that holds many of them funds itself more cheaply than a bank that pays interest on most of its deposits. The share is a fact about the bank’s mix of customers. It tells you nothing about the rate on any one account.
Deposit Rate Percentile: Where a bank’s average rate paid on deposits sits among all FDIC filers for the same quarter, counted one vote per bank and not weighted by the size of the bank. A percentile of 80 means that the bank’s quarterly average was above that of 80% of filers. Most U.S. banks are small community banks, so the percentile describes the field of banks, and not the share of deposits that the field holds.
Reciprocal Deposit: A deposit exchanged between banks within a network (such as IntraFi) to effectively extend FDIC insurance beyond the standard $250,000 limit. Your bank splits your large deposit into $250,000 chunks and swaps them with other network banks, so the full amount is FDIC-insured, but you still interact with just one bank. Over 64% of U.S. banks participate in a reciprocal deposit network.
Asset-Liability Management (ALM): The process banks use to manage financial risks arising from mismatches between the timing and interest rate sensitivity of their assets (like loans and bonds) and liabilities (like deposits and borrowings). Poor ALM was the root cause of Silicon Valley Bank’s failure in 2023. The bank held long-duration bonds that lost value as rates rose, while its deposits could be withdrawn immediately.
Economic Value of Equity (EVE): A measure of how much a bank’s net worth would change if interest rates shifted. Banks calculate EVE by taking the present value of all asset cash flows minus the present value of all liability cash flows, then stress-testing the result under various rate scenarios. A large negative EVE change means the bank’s assets would lose more value than its liabilities in a rate shock, a key indicator of interest rate risk.
Unrealized Loss: A decline in the market value of an investment that hasn’t been sold yet. Banks holding bonds purchased when rates were low carry unrealized losses when rates rise, because those bonds are now worth less on the open market. These losses become real only if the bank is forced to sell, but they can signal vulnerability, as happened during the 2023 banking crisis.
SBA 7(a) Loan: A Small Business Administration loan program that provides government-guaranteed financing (up to 85% of the loan amount) to small businesses. Banks originate the loans and can sell the guaranteed portion on the secondary market for immediate gain-on-sale income while retaining the unguaranteed portion and servicing rights. SBA 7(a) lending is the core revenue engine for some banks that use competitive deposit rates to fund their lending operations.