
--
Will Microsoft be the largest company in the world by market cap on June 30?
24h Vol
$549.1K
Liquidity
$245.2K
Spread
0%
6/30/2026
View marketFinance
Polymarket market
Track live probability, outcome prices, volume, liquidity, and resolution details for S&P 500 (SPX) Up or Down on June 8?. The market currently shows a live probability of 48%, $3.9K in 24h volume, and $14.9K in liquidity.
Probability
48%
24h Volume
$3.9K
Liquidity
$14.9K
This market asks a simple but specific question: will the S&P 500 finish Monday, June 8, 2026, above or below its last official closing level from the previous trading day? Because the S&P 500 is the headline benchmark for large U.S. stocks, even a one-day move can reflect shifting views on economic data, Federal Reserve expectations, corporate earnings, or broader risk sentiment.
The outcome is determined by the official S&P 500 Index closing price for SPX on June 8, 2026 compared with the official close from the most recent prior trading day, usually the previous Friday unless there is a market holiday. If Monday’s official close is higher, the market resolves to "Up"; if lower, it resolves to "Down." If the two closes are exactly equal, or if SPX does not trade during the regular session, the market resolves 50-50, and the rules also cover shortened sessions and certain disruption cases.
There is real uncertainty around any single session in a major index because the S&P 500 can move on macro news, Treasury yields, inflation data, central bank signals, or broad shifts in investor appetite. This page is effectively pricing whether the index will end that specific Monday modestly higher or lower than its prior close, with the current setup showing a slight lean toward Down. The market is especially sensitive because the date is tied to one exact closing comparison, not a longer-term trend.
The price can move if traders reassess the likely direction of U.S. equities into the June 8 close, especially around any scheduled economic releases, Fed commentary, or major corporate developments that affect large-cap stocks. Because the contract resolves on the official closing print, late-session moves in index futures, bond yields, or market-wide risk sentiment can matter a lot. Any holiday-related timing issue also matters, since the contract uses the most recent prior trading day’s close if the immediately preceding day is not a regular session.
Related markets

--
24h Vol
$549.1K
Liquidity
$245.2K
Spread
0%
6/30/2026
View marketThe current market price implies roughly a 48% chance for the leading outcome, based on live Polymarket pricing. That number is not a prediction from PredictionNinja and it is not a guarantee; it is the current crowd-priced view of the market and can change quickly when new information appears.
Readers should check the exact official closing values used for SPX on June 8 and on the immediately preceding valid trading day, since that comparison is the whole basis for resolution. The rules also say to verify whether either session is shortened or disrupted, because those cases change which closing price is used or trigger the fallback provisions. The deadline is June 8, 2026 at 20:00:00 UTC, so the key source of truth is the official S&P 500 closing level for that session rather than intraday trading or unofficial estimates.
Track live probability, outcome prices, volume, liquidity, and resolution details for S&P 500 (SPX) Up or Down on June 8?. The market currently shows a live probability of 48%, $3.9K in 24h volume, and $14.9K in liquidity.
Track live finance prediction markets focused on interest rates, inflation, stock market events, central bank decisions, and global financial forecasting trends.
Up
47.5%
Down
52.5%
This market is currently listed with an end date of Jun 8, 2026. Market timelines can change if the underlying event is postponed, rescheduled, or resolved early.
This market will resolve to "Up" if the official S&P 500 Index closing price for S&P 500 (SPX) on Monday, June 8, 2026 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day. This market will resolve to "Down" if the official S&P 500 Index closing price for S&P 500 (SPX) on Monday, June 8, 2026 is lower than the official S&P 500 Index closing price for SPX on the most recent prior trading day. E.g., ordinarily, a market on Monday would refer to the previous Friday for its most recent closing price, unless that Friday were a market holiday, in which case it would refer to Thursday, or the next most recent trading day. If the two specified closing prices are exactly equal, this market will resolve 50-50. Note that all figures will be rounded to the nearest cent using standard rounding. If SPX does not trade at all during the regular session, the market will resolve 50-50. If either of the relevant days are shortened (for example, due to a market holiday schedule), the official closing price published by S&P 500 Index for that shortened session will still be used for resolution. If either of the relevant days have no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price. The resolution source for this market is the Wall Street Journal, specifically the Close values published by the WSJ under "Historical Prices". US: https://www.wsj.com/market-data/stocks EMEA: https://www.wsj.com/market-data/stocks/emea ASIA: https://www.wsj.com/market-data/stocks/asia
Probability signal
The market is priced near the middle, which usually means traders are still weighing competing outcomes.
Liquidity context
Liquidity is relatively deep for a prediction market page, so quoted prices may be more reliable than very thin markets.
Spread
The bid-ask spread is wider, so the headline probability may be less precise than it looks.
Recent movement
The 24h move is modest, suggesting the market has not repriced dramatically in the latest feed.
The current displayed probability is 48%, based on the latest normalized Polymarket data available to PredictionNinja.
The rules and resolution criteria are pulled from the market description provided by Polymarket when available.
Prediction markets can move whenever traders react to new information, liquidity changes, injuries, announcements, news, or other event-specific developments.
No. PredictionNinja displays market data and context for research only. It is not financial, legal, betting, or investment advice.

+10.8%
24h Vol
$153.2K
Liquidity
$137.2K
Spread
0%
12/31/2026
View market
--
24h Vol
$75.9K
Liquidity
$46.9K
Spread
1%
7/1/2026
View market
--
24h Vol
$32.1K
Liquidity
$131.7K
Spread
0%
12/31/2026
View market
+4%
24h Vol
$16K
Liquidity
$9K
Spread
3%
Live
View market
+0.9%
24h Vol
$29.3K
Liquidity
$15K
Spread
0%
6/30/2026
View market