Ten tokens accounted for 62% of outstanding altcoin futures exposure, or open interest, according to Talos's weekly market report covering September 24–30, 2026. The concentrated exposure came with varying financing burdens: SOL funding was reported below zero while PUMP funding reached +21.8% annualized.
The report, published October 1, noted that altcoin open interest relative to market capitalization reached 5.6%, marking a record in Talos's tracking series. Among the largest markets in the top-ten group were SOL, XRP, HYPE, and ZEC.
Funding Rates Shift Rapidly
Perpetual futures use funding payments to keep contract prices aligned with underlying markets. Positive funding rates transfer money from long holders to short holders, while negative rates reverse that direction. A trader's financing burden depends on the specific contract, trading side, and settlement interval.
Binance settlement records from October 5, 2026, illustrate how quickly these costs can change. SOL showed positive funding of +0.010000% at both 16:00 UTC on October 4 and 00:00 UTC on October 5. PUMP's funding rate, however, changed sign within four hours: it was -0.001748% at 00:00 UTC but shifted to +0.001227% by 04:00 UTC.
At the time of observation, Binance reported approximately $1.045 billion in SOLUSDT open-interest value and approximately $142.876 million in PUMPUSDT open-interest value.
Shared Collateral Creates Risk
The concentration of exposure carries collateral considerations. On exchanges using cross-margin accounts, collateral is shared across eligible positions, meaning losses in one holding can affect resources supporting other positions. Liquidation rules trigger when account equity falls below maintenance requirements, with funding payments and losses on other positions potentially affecting liquidation conditions.
An exposure concentration figure alone cannot reveal account balances, liquidation distances, or available liquidity in the order book, making it impossible to determine whether cascading liquidations are inevitable or whether risk remains contained within the largest tokens.
The 62% concentration share identifies where exposure sat within Talos's tracked altcoin bucket. Determining whether those tokens carried unusually large derivatives positions for their size would require comparing their exposure share with their share of market value using matching assets and timestamps.
