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GRAL result

After the event it went to −8.77% at its lowest, and later to +16.85% at its highest, against the close price before FDA advisory panel vote.

The news wasPositive

Chart

The FDA advisory panel backed GRAIL's Galleri multi-cancer blood test on 23 September 2026: 10 to 0 on safety, 7 to 2 with one abstention on benefit-risk, and 6 to 4 on effectiveness. The stock was halted during the meeting, and most of the move had already come on 21 September, when the briefing documents sent it up 33.68%. It closed 24 September at $125.21, +51.70% from the signal price.

What else moved the price

The panel was not the biggest mover. The FDA briefing documents on 21 September did most of the work, taking the stock from $80.77 to $107.97 in one session. Before that GRAL drifted down with no Galleri news, to a $73.46 low on 14 September, and then rose 6.44% on 17 September on 1.53 million shares ahead of the documents. The market was little help: on 23 September, while GRAL was halted, SPY fell 0.72% and XLV 0.64%. On 24 September SPY slipped 0.08% and XLV rose 0.63%, so the +15.38% that day was the vote, not the market.

GRAL price from the signal through FDA advisory panel vote, in the order it happened.
PriceDate and time126.8973.46108.5218:1720:0011:0512:3713:3019:4920:0025 Aug14 Sept22 Sept24 Sept25 SeptAfter signalAfter FDA advisory panel vote (23 Sep 2026, 22:17 UTC)Regular sessionPre-market / After-hoursClosing price

Recorded after the event and not edited since. Past moves are not a forecast of future ones.

GRALGRAIL, Inc.
Mixed

FDA advisory panel votes on GRAIL's Galleri multi-cancer blood test

Event passed
FDA and Clinical
StockThe company this write-up is about, with its ticker symbol.
GRAL, GRAIL, Inc.
PriceWhere the shares traded when this write-up was made, and the exact minute that price was struck.
$82.54
Event Date And TimeWhen the event is expected. Shown in your own time zone, or in UTC if you switch the clock at the top of the page. If the exact hour is not confirmed, you only see the date.
13:00 23/September/2026
What else lands that dayOther news and events on the same day that could push the price around, and whether they help this trade, bury it, or work against it.
ClearNothing on the macro calendar, so the tape is the panel itself all day, and the intraday swings before the late vote are discussion rather than verdict.
Expected Stock ReactionWhich way we expect the share price to go after the event. Positive means it rises, Negative means it falls, Mixed means it could go either way.
Mixed
Turns positive ifOur call is Mixed, so this is the side that would push the price up, and what has to happen for that side to win.
The panel votes clearly yes on safety, effectiveness and benefit-risk, and accepts the current clinical package without demanding new pre-approval evidence.
Turns negative ifOur call is Mixed, so this is the side that would push the price down, and what has to happen for that side to win.
The panel decides the evidence does not prove meaningful clinical benefit, or that false positives, overdiagnosis and missing mortality data make benefit-risk unfavorable.
Technical biasWhat the chart alone suggests, ignoring the news. Rated Bullish, Neutral or Bearish.
Bullish
ActionWhat we suggest you do before the event. Buy, Watch or Avoid.
Watch
Catalyst confidenceHow sure we are that the event happens as described. Scored out of 100. Higher means more sure.
99/100
Stock-reaction confidenceHow sure we are that the stock reacts the way we expect. Scored out of 100. Higher means more sure.
72/100

Expected price move and durationHow far the share price may move because of this event, and how long that move may last.

Options-implied moveHow big a move options traders are paying for right now. This is the market's own estimate, not ours.
±29%
Our expected moveOur own estimate of the move, after weighing the market's estimate, the past moves and the situation now.
+20% to +35% on a clearly positive vote, -25% to -40% on a negative vote
ImpactHow big we think that move is for this stock. Rated Low, Medium or High.
High
Estimated durationHow long the move is likely to last, such as intraday, a few trading days, or several weeks.
1-3 trading days
Priced-in levelHow much of this news the share price already reflects. Rated Low, Medium or High. The higher it is, the less room the price has left to move.
High
Risk levelHow much can go wrong with this idea if the event surprises. Rated Low, Medium or High.
High
Other affected StocksOther companies that could move on the same news, such as suppliers and competitors.
EXAS , GH , ILMN , NTRA

Company overviewHow good the company itself is, setting this event aside. Useful if you plan to hold the shares rather than trade the news.

Company qualityHow solid the business is overall. Rated Strong, Average or Weak.
Average
GrowthHow fast the company is growing its sales and profit. Rated Low, Medium or High.
High
Financial healthCash, debt, cash flow and profit margins, and whether the company keeps issuing new shares. Rated Strong, Average or Weak.
Average
ValuationWhat you pay today for what the company earns, next to its rivals and its own past. Rated Cheap, Fair or Expensive.
Expensive
RiskHow much could go wrong with the business over years. Rated Low, Medium or High. This is not Risk level above, which is about this one event.
High
Overall outlookOur long-term view of the company. Positive, Neutral or Negative. This is not Expected Stock Reaction, which covers one event.
Positive
Best suited forThe kind of investor this stock fits, such as someone holding for years or someone who wants income.
Speculative long-term growth investors

For information only · not financial advice.