What Is a Basis Point?

A basis point (bp) is one hundredth of a percent: 1 bp = 0.01% = 0.0001. Finance uses basis points instead of percentages to describe interest rates, credit spreads, and fees without the ambiguity of saying "a percent of a percent." 100 basis points equal 1.00%, so a rate that moves from 4.25% to 4.50% has moved 25 basis points.

Basis point, defined

A basis point (often abbreviated bp, plural bps, and pronounced "bip" or "beep" on trading desks) is the smallest whole unit used to quote changes in interest rates and other percentages. One basis point equals 0.01%, or 0.0001 in decimal form. It exists to remove ambiguity: if someone says a rate "rose 1%," do they mean it went from 5% to 6% (a full percentage point) or from 5% to 5.05% (1% of the current value)? Quoting in basis points ends the confusion — "the rate rose 100 basis points" can only mean a move of one full percentage point.

The conversions to memorize:

1 basis point = 0.01% = 0.0001
10 basis points = 0.10% = 0.001
25 basis points = 0.25% = 0.0025
50 basis points = 0.50% = 0.005
100 basis points = 1.00% = 0.01

How to convert basis points and percentages

The math is a single step in either direction:

Basis points to percent: divide by 100. 75 bps ÷ 100 = 0.75%.
Percent to basis points: multiply by 100. 1.5% × 100 = 150 bps.
Basis points to decimal: divide by 10,000. 250 bps ÷ 10,000 = 0.025.

Basis points	Percent	Decimal
1 bp	0.01%	0.0001
25 bps	0.25%	0.0025
50 bps	0.50%	0.0050
100 bps	1.00%	0.0100
500 bps	5.00%	0.0500

Where basis points show up

You will see bps quoted across almost every corner of finance:

Interest rates: "The 10-year Treasury yield jumped 12 bps to 4.32%." That is a move of 0.12 percentage points.
Credit spreads: a corporate bond yielding 180 bps "over Treasuries" pays 1.80% more than the comparable government bond — compensation for extra default risk.
Fees: an ETF with a 0.03% expense ratio is often described as charging "3 basis points." On a $10,000 position that is $3 a year.
Mortgage and loan pricing: lenders quote rate adjustments in bps; a 25 bp bump on a 30-year loan changes the monthly payment measurably.

Why the tiny unit matters: on large balances, small moves are big money. A 10 bp change (0.10%) on a $50 million bond portfolio is $50,000 a year. Precision language avoids costly misunderstandings.

Why the Fed moves in 25 bp steps

The Federal Reserve's Federal Open Market Committee (FOMC) sets the federal funds target rate, and it almost always adjusts it in increments of 25 basis points — a quarter of a percentage point. This "quarter-point" convention gives the Fed a granular, predictable dial: it can tighten or ease policy in measured clicks rather than large jumps that might shock markets. A move of 25 bps is a standard hike or cut; 50 bps is a "double" or supersized move signalling urgency; 75 bps is rare and reserved for aggressive tightening (as seen in 2022); a 0 bp decision means the Fed held steady. Traders watch not just the decision but the size in basis points, because a 25 vs. 50 bp surprise can swing rate-sensitive assets sharply.

A common mistake: a basis point is a unit of change or level, not a percent of another number. "The Fed cut 50 bps" means the target rate fell 0.50 percentage points — not that it fell by 50% of its value. Mixing those up can be an enormous error on a real position.

Basis points for traders

If you trade rate-sensitive names — banks, homebuilders, REITs, high-yield bond ETFs — FOMC decisions quoted in basis points move your underlyings and the implied volatility on their options. A surprise 25 bp deviation from what the market priced in can gap a stock at the open. At ClaudeQuantAlgo we treat macro events like FOMC as scheduled volatility, not as trade signals by themselves; every idea still has to clear our adversarial review before it becomes a trigger-based card on the public record. If you want to see how event risk gets framed into concrete triggers, targets, stops, and time-stops, browse the signals or join the Discord — the public scoreboard, daily watchlist, and Academy fundamentals are free, no card required.

Want to see how a quarter-point surprise actually plays out on the tape? Read our guide to trading FOMC for the mechanics.

Common questions

How much is 1 basis point?

One basis point equals 0.01%, or 0.0001 in decimal form. There are 100 basis points in one full percentage point, so 100 bps = 1.00%.

How many basis points is a 0.25% rate change?

A 0.25% change equals 25 basis points. Multiply any percentage by 100 to convert it to basis points (0.25 × 100 = 25).

Why does the Federal Reserve move in 25 basis point steps?

The Fed adjusts its target rate in 25 bp (quarter-point) increments to give itself a granular, predictable dial. Measured steps let it tighten or ease policy without the market shocks that larger, abrupt moves could cause. A 50 bp move signals urgency; 75 bps is rare and aggressive.

What is the difference between a basis point and a percentage point?

A basis point is one hundredth of a percentage point. If a rate goes from 4.00% to 5.00%, that is a 1 percentage-point move, or 100 basis points. Using bps avoids the ambiguity of saying a rate rose 'a percent.'

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Last updated 2026-07-15 · ClaudeQuantAlgo Research Desk · research and education only.

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