Trading Bond Futures (ZB & ZN) Under Prop Rules

Treasury futures are where the market prices interest-rate expectations in real time — and they’re quoted in a fraction system that trips up newcomers on day one. Get the tick math wrong on a rate day and a “small” bond position can breach a drawdown you thought was miles away.

ZB and ZN: pricing in 32nds

Bonds don’t trade in decimals. They trade in points and 32nds of a point, a convention inherited from the cash Treasury market. Both ZB and ZN are contracts on $100,000 face value of debt.

ZB — the 30-Year U.S. Treasury Bond future. A full point is $1,000, and the minimum tick is 1/32 of a point, worth $31.25. A quote like 118'16 means 118 and 16/32.
ZN — the 10-Year U.S. Treasury Note future. A full point is also $1,000, but ZN trades in half-32nds (1/64), worth $15.625 per tick, because the 10-year is less volatile than the 30-year.

The apostrophe notation is the part that confuses people: the digits after the tick are thirty-seconds, not decimals. 118'16 is not 118.16 — it’s 118.50 in decimal terms. Read it wrong and your stop math is off by a factor you won’t like.

What moves treasuries: FOMC, CPI, auctions

Bonds are a bet on the path of interest rates and inflation, and yields and price move inversely — when yields rise, ZB and ZN fall. They react hardest to the data that reprices that path:

FOMC decisions and the press conference — the single biggest scheduled driver. Both the rate move and the tone of the statement matter.
CPI and PCE inflation prints — hotter inflation generally pushes yields up and bond prices down, and vice versa.
Nonfarm payrolls — a strong labor market pulls rate-cut expectations forward or back.
Treasury auctions — the government’s regular debt sales can move the long end on weak or strong demand.

The common thread: these are scheduled events. You always know when the volatility is coming, which means there’s no excuse for being caught oversized into one. Duration matters too — the 30-year ZB moves more than ZN for the same shift in yield.

Tick value and why it surprises new traders

The surprise for most traders is how much a “one-tick” move is worth. Because the tick denominators are unusual, people mentally price ZB like an equity index and get the risk wrong.

A worked example on ZB: an eight-tick stop — a very ordinary distance — is 8 × $31.25 = $250 per contract. Two contracts is $500 on a single, normal-looking stop, and on a rate day the range can be many multiples of that. ZN is gentler at $15.625 a tick, which is exactly why it’s the better place to learn the product: the same rate-driven behavior at roughly half the dollar sensitivity.

Never size a bond position by contract count out of habit. Convert your intended stop to ticks, multiply by the tick value, and confirm the dollar risk before you click. A position size calculator removes the fraction arithmetic from the equation.

Sizing bonds around rate-day volatility

The mistake that ends funded accounts on Treasuries is carrying normal-day size into an abnormal-day event. Range on FOMC or a CPI surprise can be several times a quiet session, so a stop that’s comfortable on Tuesday is a coin flip on Wednesday afternoon. A stop is an order, not a guaranteed fill — in a rate spike price can gap straight through it.

Two rules keep you out of trouble:

Cut size for scheduled events, or stand aside. If you must be in for FOMC, trade a fraction of your normal size and accept that the range will be wide.
Widen the stop, then shrink the contracts. A rate-day stop has to be wider to survive the noise — which means fewer contracts to hold the same dollar risk, not the same contracts with a wider stop.

Shibiki’s auto-journaling tags every trade with its timestamp, so you can look back and see honestly whether your rate-day trades actually make money or just feel exciting. Its live edge health tracks each bond strategy’s expectancy with a Wilson confidence interval, so one lucky FOMC doesn’t convince you a coin flip is an edge.

Fitting treasuries into a prop drawdown

Because bond ticks are worth real money, Treasuries interact hard with a trailing drawdown. A single ZB position swinging through a rate release can move your equity — and therefore your trailing floor — fast enough to leave you with far less cushion than the closing print suggests, especially if your firm trails on unrealized peaks. Confirm your firm’s exact drawdown method and news-trading rules; these vary by program and change over time.

Before any rate day, know your remaining cushion in ticks, not just dollars, and read the mechanics in our explainer on how trailing drawdown works. The safest posture is one where a full bond stop consumes only a small slice of your floor — if it wouldn’t, you’re too big. Shibiki can enforce a hard max-loss limit at the broker so an FOMC spike can’t carry you past your daily line while you’re still deciding what to do. Programs built for futures traders, like TradeDay, pair well with a disciplined Treasury approach.