Nets vs. Celtics: O/U 223.5

Named source: NBA official (implied) · End date Oct 27, 7:30 PM ET · Live market: Nets vs. Celtics: O/U 223.5 · View rules on Polymarket (international site) ↗

Explain it simply

Built from this market’s own rules and prices. It is research, not a recommendation.

1.What this market is really asking

Nets and Celtics: O/U 223.5 play a basketball game, scheduled for October 27 at 7:30 PM ET.

This market asks: who will win?

2.Words to know

ET: Eastern Time, the time zone of New York.
Spread: The gap between the highest price someone will pay and the lowest price someone will accept.
Share: One unit of a market. A share pays $1 if its result happens and $0 if it doesn’t.
Price in cents (¢): Prices run from 0¢ to 100¢ and work like a percent chance. 94¢ means the crowd gives it about a 94% chance.
Official source: The organization named in the rules whose report decides the result.
Settle (resolve): When a market is decided and shares pay out. Venues use “resolve” to mean the same thing.
50-50: Every share pays 50¢, whichever side it is. Markets use this when the rules say a result can’t be decided.
Overtime: Extra playing time added when a game is tied at the end of normal time.
Regulation time: The normal length of a game, before any overtime.
Polymarket: The prediction market whose prices we show. Its main site is not available to US residents.
Kalshi: A US exchange that lists similar markets. It is regulated by the CFTC, and its rules can differ from Polymarket’s.

3.Each possible result

Spread: Celtics (-11.5)Crowd’s chance: about 55%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.
Nets vs. Celtics: O/U 221.5Crowd’s chance: about 53%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.
Spread: Celtics (-12.5)Crowd’s chance: about 51%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.
Nets vs. Celtics: O/U 222.5Crowd’s chance: about 50%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.
Nets vs. Celtics: O/U 223.5Crowd’s chance: about 48%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.
Nets vs. CelticsCrowd’s chance: about 14%
What it would mean: This result happens.
What has to happen: The question’s answer is yes.

Each result is its own market, so these chances come from separate prices and may not add up to exactly 100%.

4.How the payout works

Each Over share pays $1 if Over wins and $0 if not. Under shares work the same way.

At 48¢, the crowd gives Over about a 48% chance.

In the special cases listed under the fine print, every share pays 50¢ instead.

Prices change all the time. This is a snapshot of what traders think, not a forecast from us.

5.Why the price is where it is

We haven’t found an official source explaining this yet.

6.Fine print in plain English

If the game is postponed, the market stays open until it is played.
If the game is canceled with no make-up game, the market settles 50-50.

The short version

How to read this page

Traders give Over about 48% and Under about 52% in “Nets vs. Celtics: O/U 223.5”.

There is no price change on record for today yet, and there are more sell orders than buy orders waiting near the price right now.

Low surprise risk: the official final result settles it, overtime included.

Describes the price, the order book and the contract rules. It is research, not a recommendation.

Sports event contracts are restricted or under legal challenge in several US states. Check your state’s law and the venue’s terms.

Polymarket prices shown here come from Polymarket’s international site (polymarket.com), which is not available to US residents. Polymarket US is a separate CFTC-regulated venue with its own prices. Prediction market access depends on where you live. Follow each venue’s terms and location rules, and do not use a VPN or other tools to get around them.

Live price & chartPro

Pro shows the exact price, the change in points, the price history and every real price move here.

See Pro

Show details for experienced traders

The details

Rule note: full game including overtimeSettled by NBA official (implied)

Fine-print risk

Low (20/100)

Match / Game Final

Pro adds the exact price, today’s change in points, buyers vs sellers in dollars, the price chart and every recorded move. See Pro

Official source: settlement runs on The rules name no source; the official NBA final result is the implied reference. Posts the final result after the game. No recorded moves for this market yet.
Fine print: Settles on the official final result as played, overtime included. Postponed games stay open until completed; cancellations follow the stated fallback. Deadline: Tue, Oct 27, 2026, 7:30 PM ET (scheduled start). Check regulation vs. overtime inclusion (this total includes overtime), the postponement rule (Polymarket holds open until the game is played) and cancellation handling (50-50 on Polymarket vs. void/refund on sportsbooks and Kalshi's own contract terms).

No resolution source named in the rules (implied: NBA official result)

Standardized read of public order book, official-source and contract-rule data, identical for every viewer. It describes the data and is not a recommendation. The venue’s published rules control settlement.

Nets vs. Celtics: O/U 223.5

5-point rule check

Polymarket

Named source: NBA official (implied)

Fine-print risk: Low (20/100)

Source
Deadline
Counts as Yes
Backup rules
Other venues

Fine-print risk Low 20

Who settles it (official source)

The rules name no source; the official NBA final result is the implied reference

Deadline and time zone

Tue, Oct 27, 2026, 7:30 PM ET (scheduled start) America/New_York

What counts as Yes

Match / Game FinalFinal combined score of the game as played; the text does not exclude overtime, so OT points count. Rule text: "…This market will resolve to "Over" if the Nets and Celtics combine to score 224 or more points in this game. If the combined total is l…"

Backup rules (delays, cancellations, revisions)

If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50.

Fine print and other venues

Cross-venue & fine-print settlement trap: Check regulation vs. overtime inclusion (this total includes overtime), the postponement rule (Polymarket holds open until the game is played) and cancellation handling (50-50 on Polymarket vs. void/refund on sportsbooks and Kalshi's own contract terms).

Rules text on file (Polymarket)

In the upcoming NBA game, scheduled for October 27 at 7:30 PM ET: This market will resolve to "Over" if the Nets and Celtics combine to score 224 or more points in this game. If the combined total is less than 224, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50.