What Is Basis in Futures Trading?
Basis in futures trading is the difference between a futures contract's price and the spot price of its underlying asset, calculated as futures price minus spot price. A positive basis means the futures contract trades at a premium to spot — for example, if Bitcoin's spot price is USDT 60,000 and the Bitcoin perpetual futures price is USDT 60,300, the basis is +300, a premium condition similar to contango in traditional futures markets. A negative basis is the reverse: the futures price sits below spot, such as a futures price of USDT 59,700 against the same USDT 60,000 spot level, producing a basis of -300, comparable to backwardation. On Pluang's perpetual Crypto Futures contracts, basis has no expiry date to force convergence, since these contracts never expire the way dated futures do. Instead, the funding rate exchanged directly between long and short holders every 8 hours is the mechanism that continuously pulls the futures price back toward spot, keeping the basis from widening indefinitely in either direction.
- Positive basis (futures > spot): often reflects strong bullish sentiment or high demand for leveraged long exposure; historically associated with contango-like premiums in traditional futures markets.
- Negative basis (futures < spot): often reflects bearish sentiment or heavier short positioning; comparable to backwardation.
- Basis is not fixed — it fluctuates continuously as spot and futures prices move independently of each other throughout the trading day.
- On perpetual contracts, there is no expiry date to force the futures price back to spot, unlike dated futures contracts that naturally converge as expiry approaches.
- The funding rate substitutes for expiry-driven convergence: when basis is positive, longs pay shorts, discouraging new long positions and narrowing the gap; when basis is negative, shorts pay longs, discouraging new short positions and narrowing the gap from the other direction.
Related questions:
Q: Does a positive basis mean the futures price is guaranteed to fall back to spot?
No. A positive basis reflects current premium pricing on the futures contract relative to spot, but nothing guarantees it will close on any set timeline. Positive basis, together with a positive funding rate, creates a financial incentive for the price gap to narrow over time as holding long positions becomes costlier, but the basis can also widen further before it narrows, depending on ongoing market demand for that specific contract.
Q: How is basis different from Mark Price?
Basis measures the gap between the futures price and spot price, while Mark Price is the weighted average price across major global exchanges used specifically for unrealized PnL calculation and liquidation triggers on Pluang. They serve different purposes: basis is a market-pricing concept describing premium or discount, while Mark Price is a risk-management reference point distinct from the last traded execution price on the order book.
Q: Can basis be zero?
Yes. A basis of zero means the futures price and spot price are trading at exactly the same level, with no premium or discount between them. This can happen briefly at any point as both prices move, particularly when funding rate pressure has pulled the futures price back in line with spot after a period of positive or negative basis.
Q: Why does perpetual futures pricing rely on funding rate instead of an expiry date to control basis?
Because perpetual contracts on Pluang never expire, there is no scheduled settlement date that would otherwise force the futures price to converge with spot the way a dated futures contract does. The funding rate exchanged every 8 hours between long and short holders takes over that role instead, applying a direct cost to the side of the market pushing the basis further from spot, which keeps the perpetual price anchored close to the underlying asset's spot price over time.