Trading Halts: What Actually Sets the Reopening Price

Your stock halts on a headline, and for five minutes your account balance is a guess. Then it reopens, and the print lands somewhere you didn't expect, up or down, and nobody told you a halt doesn't resume where it left off. There are two c

Your stock halts on a headline, and for five minutes your account balance is a guess. Then it reopens, and the print lands somewhere you didn't expect, up or down, and nobody told you a halt doesn't resume where it left off.

There are two completely different reasons a stock stops trading, and a specific auction process that decides where it starts again. Most explainers stop at "why halts happen." The part that actually costs you money is what happens in the five minutes after, and that process changed in a real way in July 2025.

A halt comes in two very different flavors

A single-stock pause and a market-wide circuit breaker get lumped together constantly, and they're not the same trigger at all. The Limit Up-Limit Down mechanism (LULD), which SEC-registered exchanges and FINRA built together, reacts to one security moving outside a price band calculated from its own trading. A market-wide circuit breaker reacts to the S&P 500 index falling hard in a single day, and when it trips, every listed stock stops, not just the one you're watching.

One is about a single name getting too volatile for its own order book. The other is about the entire market. Confusing the two is how a trader assumes "the market must be crashing" over a halt in one stock that has nothing to do with the index.

Nasdaq's bands are a published table, not a feeling

The band a stock gets isn't discretionary. Nasdaq's own Limit Up-Limit Down FAQ lays out the exact percentages by tier and price, recalculated from the arithmetic mean price of trades over the preceding five minutes.

Cheaper stocks get more room to move before they trip a pause: 20% for names between $0.75 and $3, and the lesser of $0.15 or 75% below that. Every one of those bands doubles in the last 25 minutes of the trading day, per the same table, because a thinner closing book needs more room to breathe.

Fifteen seconds, twice, decides pause or blip

A price band alone doesn't halt anything. What halts a stock is the National Best Bid or Offer resting right at that band, without a trade, for 15 straight seconds. That's a "limit state." If trading resumes inside the band before the 15 seconds is up, nothing happens and most traders never notice.

If the limit state is still live 15 seconds later, the primary listing exchange declares a five-minute trading pause. This is the mechanic behind why a stock in play can halt several times in one session: it isn't one big move, it's the price repeatedly camping at a band edge on unusually high volume.

Your orders don't vanish. Trading does.

A pause stops executions, not your resting orders. Nasdaq's FAQ is explicit that open orders remain on the book during a limit state or pause unless you cancel them yourself, and new orders can still be entered while trading is quoted-only.

A halt doesn't clear your book. It just stops telling you what your book is worth until the auction says otherwise.

— The Tradoki desk note

That includes the stop order you placed that morning. Where a stop actually fills once price starts moving again was already a live question before a halt; a five-minute gap in trading, followed by an auction print that can legally sit 10% or more from the halt price, makes the gap between your stop price and your fill price a real number, not a rounding error.

Until July 2025, the reopening print had no ceiling of its own

This is the part almost nothing written for retail traders covers. A halted stock doesn't just "start trading again." The primary exchange runs a reopening auction, matching the buy and sell interest that piled up during the pause into a single opening trade.

For years, Nasdaq's halt cross ran without the kind of price collar that its regular opening and closing auctions already used. Nasdaq's own filing with the SEC gives the reason it finally changed: in its November 2024 rule filing, the exchange cites "an instance where a stock was halted for pending news and reopened at a price that was significantly away from its current market value due to an erroneous execution" back in February 2023.

The distinction matters. A fat-finger reprint is exactly what the new collars are built to catch. A stock that genuinely deserves to reopen 25% away from its halt price, because the news was real, will still get there, just through a few more five-minute rounds instead of one erroneous cross.

Market-wide circuit breakers are a different machine entirely

The market-wide version doesn't care about your stock specifically. Per the SEC's own investor education page, a decline in the S&P 500 trips three levels against the prior close: 7% (Level 1), 13% (Level 2), and 20% (Level 3). Hitting Level 1 or 2 before 3:25 p.m. Eastern halts every market in the country for 15 minutes. Hitting either of those same levels at or after 3:25 p.m. does not halt anything, on the logic that there isn't enough of the day left for a pause to matter. Level 3, a 20% drop, ends the trading day outright, at any time it's reached.

Circuit breaker level	S&P 500 decline	Halt if reached before 3:25pm ET	Halt if reached after 3:25pm ET
Level 1	7%	15-minute market-wide halt	No halt
Level 2	13%	15-minute market-wide halt	No halt
Level 3	20%	Trading closes for the day	Trading closes for the day

This is governed under each exchange's own version of the rule, Nasdaq's included, referenced in the same filing that created the new reopening collars: a market-wide circuit breaker triggers off the S&P 500's decline against the prior close, a separate mechanism from LULD even though both can put "HALT" on your screen.

What this means for the next halt you sit through

None of this tells you which direction a halt resolves. What it tells you is the shape of the risk. A single-stock LULD pause is a five-minute minimum with a collared, if imperfect, reopening process behind it. A market-wide circuit breaker is rarer, bigger, and only halts trading at all if it hits before 3:25 p.m.

The trap is treating a halt as a pause button on your risk. It isn't. Liquidity that looked like it was there before the halt can be gone entirely once trading resumes, and a stock that was already a high relative-volume name, exactly the kind more likely to test its own bands, doesn't become calmer for having stopped moving for five minutes. Regulators have shown they'll change the mechanics when a specific failure gets bad enough, the same way the pattern day trader rule itself got replaced rather than patched. Whatever collar exists today is the current answer to a past problem, not a permanent ceiling on how far a reopening print can move.

● FAQ

What causes a stock trading halt?

Two different mechanisms, and they get confused constantly. A LULD (Limit Up-Limit Down) pause fires when one stock's price tries to move outside a band calculated from its own recent trading. A market-wide circuit breaker fires when the S&P 500 itself drops sharply in a single day, and it stops every listed stock at once, not just one.

What are the LULD price bands?

Per Nasdaq's published rule, Tier 1 stocks (S&P 500, Russell 1000, and some exchange-traded products) priced above $3 get a 5% band during regular hours. Tier 2 stocks, which is everything else, get 10%. Lower-priced stocks get wider bands still, and every band doubles in the last 25 minutes of the trading day.

How long does a trading halt actually last?

A LULD pause is a minimum of five minutes. Price has to sit at the edge of its band with no trade for 15 seconds to enter a 'limit state,' and if that's still unresolved 15 seconds later, the five-minute pause begins. It can run longer than five minutes if the reopening auction can't find a price that satisfies both sides.

What sets the price when a halted stock reopens?

A reopening auction matches the buy and sell orders that built up during the pause. Since July 14, 2025, Nasdaq's Halt Cross Price Protections keep that reopening price inside collars, starting at 10% from a reference price and widening every 5 minutes until the auction finds a price inside the range.

Do my open orders survive a trading halt?

Yes. Per Nasdaq's own FAQ, resting orders stay on the book during a pause; only new trades stop. That includes any stop or limit order you placed before the halt, which is exactly why knowing how the reopening price gets set matters to you and not just to the exchange.