S&P Dow Jones Indices and Kalshi Team Up to Bring Trusted Benchmarks to Prediction Markets

S&P Dow Jones Indices and Kalshi announced a strategic collaboration on Monday under which forthcoming Kalshi event contracts will settle against official index values published by S&P DJI, pairing the world's leading index provider with a regulated prediction market platform.

The agreement makes Kalshi a preferred prediction market platform licensed for event contracts tied to S&P DJI indices, and it makes S&P DJI a preferred provider for constructing indices from Kalshi event contract data. That two-way structure is the whole story in one sentence: Kalshi gets licensed benchmarks and the credibility that comes with them, while S&P DJI gets a new source of market data — the prices prediction markets produce — to build indices from.

Why settlement against official values matters

Forthcoming Kalshi event contracts will settle against official index values published by S&P DJI, the same reference standard that professional markets rely on every day, the companies said. Settlement is where a prediction contract stops being an opinion: when a contract expires, the official index value decides who is paid, so the source of that value has to be beyond argument. The companies framed the arrangement in those terms — contracts built on transparent methodologies, quality data, independent calculation and governance. Cathy Clay, chief executive of S&P Dow Jones Indices, said: "Our collaboration extends S&P DJI's role as the world's leading benchmark provider into one of the fastest-growing categories in financial markets," adding that robust indices help to define markets and set rules for monitoring their evolution.

A two-way trade in benchmarks and trust

For Kalshi, the licensed benchmarks come with a name its users and regulators already know. Tarek Mansour, co-founder and chief executive of Kalshi, said: "Kalshi's aspiration is to be the next great financial exchange," and called S&P DJI the gold standard for benchmarks, saying bringing that standard to Kalshi is an important step toward accelerating retail and institutional demand. Reuters framed the agreement as a trust cushion for Kalshi — a platform that, in Reuters' telling, has faced allegations of being a gambling platform — because the index provider is a well-known and trusted name in finance. That context is Reuters' framing, and it points at the commercial logic: a benchmark license does not settle the gambling debate, but it puts Kalshi's index contracts inside the same reference framework professional markets use.

Indices built from prediction prices

The other direction may matter more over time. The collaboration will bring together Kalshi's market data and S&P DJI's expertise to open the door for indices, such as indices on economics, politics, and sports, built from the underlying markets on Kalshi. Event contracts turn expectations about real-world outcomes into prices. Applying S&P DJI's index methodologies to Kalshi data will enable the creation of indices that reflect those expectations, offering market participants a new way to observe and assess signals stemming from prediction markets, the companies said. Reuters described the new indices tracking economics, politics and sporting events as S&P's foray into the nascent prediction-market world, in an industry where platforms such as Kalshi and Polymarket have gained prominence by enabling wagers on outcomes from sports and elections to military operations. S&P Dow Jones Indices is home to the S&P 500 and the Dow Jones Industrial Average and is a division of S&P Global. Kalshi, founded in 2018, describes itself as the first regulated exchange for events and is credited with legalizing and establishing prediction markets as a financial asset class.

What the announcement did not say

What remains unknown is substantial, and the announcement leaves it plainly open. No financial terms were disclosed, no launch date for the first contracts was given, and no specific index list beyond the S&P 500 trademark reference was announced. The release carries the standard trademark disclaimer: Kalshi's contracts based on the S&P 500 and other S&P indices are not sponsored, sold or endorsed by S&P DJI. What to watch next is therefore concrete: the first S&P-settled contract launches and the indices they are tied to, trading volumes on those contracts once they list, any disclosed licensing terms, and whether the new prediction-data indices on economics, politics and sports are published with methodologies readers can inspect. Until the first contracts appear, Monday's news is a framework — two preferred-provider commitments and a settlement standard — not yet a product.