Behavior.
The habits, rules of thumb, and mental traps that shape financial decisions. Plain definitions for the ideas behind budgeting, saving, and spending well.
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Compound interest
Interest that earns interest. The longer money is invested, the more it accelerates.
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Delayed gratification
Choosing a larger reward later over a smaller one now, the core habit behind saving and investing.
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Dollar-cost averaging (DCA)
Investing the same amount of money on a regular schedule, regardless of price.
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Financial caregiving
Managing or paying for another person's finances and care, from covering costs to handling bills, often at a cost to your own money.
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Impulse spending
Unplanned buying decided in the moment, often nudged by design tricks, that adds up and strains a budget over time.
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Opportunity Cost
Opportunity cost is the value of the best thing you give up when you choose one option over another, whether or not money changes hands.
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Present bias
The tendency to overweight rewards you can have now over larger rewards later, which makes saving and other long-term choices hard.
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Sandwich generation finances
The money strain of supporting your own children and aging parents at the same time, squeezing your budget and your own saving.
Most read in Behavior
Compound interest ★
Interest that earns interest.
Emergency fund
Cash set aside for actual emergencies, not vacations, not 'opportunities.' Usually 3-6…
Net worth
What you'd have left if you sold everything you own and paid off everything you owe.
Opportunity Cost ★
Opportunity cost is the value of the best thing you give up when you choose one option…
Discretionary spending
Discretionary spending is the money you spend on wants rather than needs, like dining…
All behavior terms, A to Z
A 4 terms
Action bias
The urge to do something rather than nothing, even when waiting is the better move, common when markets are volatile.
Analysis paralysis investing
Getting so stuck researching and comparing investment options that you delay or never start, which itself carries a cost.
Anchoring bias
The way a first number you see sticks in your mind and pulls later judgments toward it, even when that number is arbitrary.
Availability heuristic
Judging how likely something is by how easily examples come to mind, so vivid or recent events feel more common than they are.
B 2 terms
Bag lady syndrome
A persistent, often irrational fear of ending up destitute, common among women, that can drive over-saving and money anxiety even when finances are sound.
Buyer's remorse
The regret or second-guessing that can follow a purchase, especially a big or impulsive one, once the excitement fades.
C 4 terms
Cash stuffing
A budgeting method of dividing cash into labeled envelopes for each category, so spending stops when an envelope is empty.
Choice overload
When too many options make it harder to decide, so people delay, avoid, or feel worse about the choice they finally make.
Compound interest★
Interest that earns interest. The longer money is invested, the more it accelerates.
Confirmation bias (investing)
Seeking out information that supports what you already believe about an investment while dismissing evidence against it.
D 6 terms
Default bias / inertia
The tendency to accept whatever option is preset, so defaults on a retirement plan or account quietly shape what most people end up with.
Delayed gratification★
Choosing a larger reward later over a smaller one now, the core habit behind saving and investing.
Discretionary spending
Discretionary spending is the money you spend on wants rather than needs, like dining out, travel, and entertainment, that you can cut back if you choose.
Disposition effect
The habit of selling winners too early and holding losers too long, driven by wanting to lock in gains and avoid admitting a loss.
Dollar-cost averaging (DCA)★
Investing the same amount of money on a regular schedule, regardless of price.
Doom spending
Spending to cope with anxiety about the world or the future, a way of feeling control when things feel out of control.
E 3 terms
Emergency fund
Cash set aside for actual emergencies, not vacations, not 'opportunities.' Usually 3-6 months of expenses.
Emotional / revenge spending
Buying to change how you feel rather than because you need something, often to relieve stress, boredom, or a bad day.
Endowment effect
The tendency to value something more just because you own it, so you demand more to sell it than you would have paid to buy it.
F 7 terms
Financial anxiety
Persistent worry and stress about money that can affect health and decisions, sometimes regardless of how stable the finances actually are.
Financial caregiving★
Managing or paying for another person's finances and care, from covering costs to handling bills, often at a cost to your own money.
Financial enmeshment
When parents pull children into adult money matters they are not ready for, like sharing money fears or using a child as a confidant.
Financial infidelity
Hiding money behavior from a partner, like secret debt, hidden accounts, or undisclosed spending, in a shared financial life.
FOMO (fear of missing out)
The anxious pull to jump into a hot investment or purchase because others seem to be winning, often near the top.
Framing effect
When the way a choice is worded changes your decision, even though the underlying numbers are identical.
Frugality vs. cheapness
Frugality is spending less to get more value; cheapness is minimizing cost even when it sacrifices value, quality, or other people.
H 3 terms
Hedonic adaptation
The way people return to a baseline level of happiness after a gain, so a raise or purchase gives a shorter-lived boost than expected.
Herd behavior
Following what the crowd is doing with money rather than your own information, a driver of bubbles and panics.
Hot-hand fallacy
Believing a recent streak of success will continue, so a fund or picker on a hot run is seen as skilled rather than possibly just lucky.
L 4 terms
Lifestyle creep
Lifestyle creep is the tendency to spend more as you earn more, so raises get absorbed by nicer things instead of higher savings.
Lifestyle deflation
Deliberately keeping or lowering your spending as income rises, the opposite of lifestyle creep, so raises turn into savings.
Loss aversion
The tendency to feel a loss more painfully than an equal gain, which pushes people to avoid risks that would actually pay off on average.
Loud budgeting
Openly telling people you are not spending because it does not fit your goals, making frugality something to say out loud rather than hide.
M 4 terms
Mental accounting
Treating money differently depending on where it came from or what it is for, even though a dollar is a dollar.
Money avoidance
A money mindset where wealth feels bad or corrupting, so a person avoids looking at finances, budgeting, or building savings.
Money dysmorphia
A distorted view of your own finances, feeling broke despite being fine, or secure despite being at risk, out of step with the numbers.
Money worship
A money mindset that treats more money as the path to happiness and problem-solving, often linked to overspending and debt.
N 2 terms
Net worth
What you'd have left if you sold everything you own and paid off everything you owe.
No-spend challenge
A set period where you buy only essentials and cut all discretionary spending, used to reset habits or hit a savings goal.
O 3 terms
One-more-year syndrome
The pattern of someone financially ready to retire who keeps working just one more year, repeatedly, out of fear the money is not enough.
Opportunity Cost★
Opportunity cost is the value of the best thing you give up when you choose one option over another, whether or not money changes hands.
Overconfidence bias
The tendency to overrate your own judgment, which with money often shows up as trading too much or believing you can beat the market.
R 3 terms
Recency bias
Giving too much weight to what happened recently, so investors expect the latest trend to continue and chase or flee at the wrong time.
Retail therapy
Shopping to lift your mood, a real short-term comfort that becomes a problem when it is a regular coping tool.
Risk tolerance
How much portfolio decline you can stomach without selling. Educational segmentation only, not advice.
S 6 terms
Sandwich generation finances★
The money strain of supporting your own children and aging parents at the same time, squeezing your budget and your own saving.
Scarcity mindset
When the feeling of not having enough narrows your focus to the immediate, making longer-term money decisions harder.
Severance
A payment from an employer to a departing employee, usually structured as a lump sum or salary continuation, often tied to a release of legal claims.
Sinking fund
Saving a little each month toward a known future expense, so the bill arrives already paid.
Status quo bias
The pull to leave things as they are, so people stick with a default account, plan, or allocation even when a better option exists.
Sunk cost fallacy
Sticking with something because of what you already spent, even when quitting would leave you better off going forward.