DraftKings and Flutter lose billions as Kalshi enters parlay market

• DraftKings lost $5.5 billion in market value and Flutter Entertainment shed $10 billion since late August as prediction market competition intensifies
• Combined $7 billion wiped from both companies’ market capitalisation on Tuesday alone following Kalshi’s parlay product launch
• Traditional sportsbooks now face direct competition in their most profitable segment, with same-game parlays typically generating margins above 10%

Sports betting giants DraftKings and Flutter Entertainment suffered devastating market losses this week as prediction market operator Kalshi launched its same-game parlay product. The sector’s dominant players saw their combined market capitalisation fall by $7 billion on Tuesday, marking their worst single-day performance in nearly two years.

Billions wiped out

DraftKings shares plummeted 11.6% to close at $37.40, wiping $2.5 billion from its market value in a single session. The company has now lost more than $5.5 billion in value since late August, with shares down 23% since the start of the college football season.

DraftKings performance

• Tuesday’s decline: 11.6% drop to $37.40
• Single-day market value loss: $2.5 billion on Tuesday alone
• Since late August: Down 23% overall
• Total market value lost since August: More than $5.5 billion
• Since college football season start: 23% decline

Flutter Entertainment fared even worse, losing $5.5 billion on Tuesday alone as shares tumbled 10.3% to $254.00. The FanDuel parent company has shed a staggering $10 billion in market value since August, representing a 19% decline over the period.

Flutter performance

• Tuesday’s decline: 10.3% drop to $254.00
• Single-day market value loss: $5.5 billion on Tuesday alone
• Since late August: Down 19% overall
• Total market value lost since August: $10 billion
• Trigger event: Kalshi’s launch of same-game parlays on Monday, September 30th

The sector-wide selloff extended beyond the two market leaders, with Caesars dropping 3.03%, MGM Resorts falling 5.12%, and Penn Entertainment declining 2.28%. Data suppliers Genius Sports and Sportradar also suffered, down 7.86% and 5.81% respectively, as investors reassessed competitive threats across the ecosystem.

Profit engine under threat

The market panic centres on Kalshi’s entry into same-game parlays, traditionally the most lucrative product for sportsbooks. These high-hold bets typically allow operators like DraftKings and FanDuel to maintain margins exceeding 10%, with parlays accounting for more than half of sportsbook revenues in markets where data is available.

The threat materialised despite Kalshi’s modest initial performance. The prediction market platform generated only $1,762 in fees from parlay trading on its launch day, representing just 0.15% of its total fee income and 0.2% of overall volume. The limited rollout was introduced without advertising and disappeared once football games began.

Analysts remain divided

Several analysts attempted to stem the panic, with Morgan Stanley advising investors to buy into the weakness and Jefferies calling Flutter’s 10.3% decline “an overreaction”. However, the damage was already done, with the combined market value destruction exceeding double the impact of Illinois’ shock tax hike in June.

Despite analyst reassurances, the fundamental threat remains clear. If Kalshi can scale its parlay offering and deliver better odds than traditional sportsbooks, it could force operators to adjust their highly profitable pricing models. The prediction market platform operates under CFTC regulation as a financial exchange, potentially giving it regulatory advantages over state-licensed sportsbooks.

The sector’s vulnerability was further exposed by growing institutional interest, with Cathie Wood’s ARK Invest purchasing over 500,000 DraftKings shares during the decline, suggesting sophisticated investors view the selloff as a buying opportunity.