TOTAL VOLUME:

$134b

24H VOL:

$103,397,351

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,410,176,180

399,592

Markets across

30,097

events

MATCHED EVENTS:

2,622

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Insights
Indices
Tour
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Crypto
Companies
Elections
Financials
Economics
Other
Entertainment
Science and Technology
Weekly Return: S&P 500 Total Return Vs. Nasdaq-100 Total Return
kalshi

Weekly Return: S&P 500 Total Return Vs. Nasdaq-100 Total Return

Volume:
$8,546

S&P 500 Total Return Index

 - Kalshi

S&P 500 Total Return Index - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved May 18, 2026

Closed: May 15, 5:00 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

S&P 500 Total Return Index

View
100%
Yes 100¢No 0¢
100¢
N/A
$1,850
N/A
N/A
$993
Settled
Yes
kalshi

Nasdaq-100 Total Return Index

View
0%
Yes 0¢No 100¢
100¢
N/A
$6,696
N/A
N/A
$5,709
Settled
No
Total markets: 2

Description

This event tracks the relative performance of two major U.S. stock market indices during a specific week in May. The market compares whether one index will outperform the other by a minimal margin, capturing a close competition between these two different measures of large-cap equity market performance.