Derivatives: futures, perps & options

A perpetual swap is a futures contract that never expires — you can hold a leveraged long or short indefinitely. Without an expiry to force convergence, something else must tether its price to spot: the funding rate.

Every funding interval (typically 8h), one side pays the other. Perp trading above spot → longs pay shorts (an incentive to sell the perp); below spot → shorts pay longs. Persistent positive funding means leveraged longs are paying a rolling fee to stay crowded — a real cost, and a sentiment gauge.

A dated future expires on a fixed date, when its price must equal spot. Until then it trades at a gap — the basis. Futures above spot = contango (the norm in bull markets, when leverage demand is high); below spot = backwardation (fear).

Because the basis must decay to zero at expiry, it is a harvestable yield: buy spot, short the future against it, and the gap converges to you regardless of price direction. This cash-and-carry trade is the market-neutral workhorse of crypto funds — its return is set by the annualized basis, its risks are exchange failure and margin management, not direction.

A call is the right (not obligation) to buy at a strike price; a put, the right to sell. The premium you pay is priced mainly by distance to the strike, time remaining, and — crucially — implied volatility (IV): the market's forecast of how much movement to expect.

The beginner trap: buying options is a bet on *more movement than the market already expects*, on a deadline. Be right on direction but slow — you lose to theta (time decay). Be right after IV collapses — you lose too. Most retail option buyers lose not because direction was wrong, but because the premium already priced their scenario in.

Liquidation levels depend on entry, size, leverage, maintenance-margin tier, mark-price methodology, collateral, fees, and other positions. Public heatmaps infer parts of that distribution from observable data and vendor models; they cannot see every account or guarantee that displayed liquidity still exists.

Pairing the direction of open interest with the direction of price helps distinguish expanding from contracting derivative exposure. Cycle the scenarios below and watch how the same price move has different candidate explanations depending on what OI is doing.

OI is aggregate outstanding contracts, not a label for longs or shorts—every contract has both. Combine it with spot/perp volume, basis, funding, liquidations, venue coverage, and timing. Even then, the interpretation is probabilistic rather than a direct view of participant intent.

Derivative venues commonly separate last price (the latest contract trade), index price (a multi-market spot reference), and mark price (a fair-price calculation used for unrealized P&L and liquidation). A brief contract print may not trigger liquidation if the mark does not follow it; conversely, watching only last price can hide how close the mark is to maintenance margin.

Isolated margin confines allocated collateral to one position. Cross margin shares eligible collateral across positions, which can delay one liquidation but allows one loss to consume funds supporting the rest of the account. Venue formulas, tiers, fees, and auto-deleveraging rules differ—read the exact contract specification.

Delta estimates price sensitivity to the underlying. Gamma measures how delta changes, making near-expiry exposure highly nonlinear. Theta estimates time decay, while vega measures sensitivity to implied volatility. Greeks are local model sensitivities, not fixed guarantees across a large move.

A long call can lose despite a price rise if the move is too small or late, or if implied volatility collapses. A short option can collect theta repeatedly and still suffer a tail loss when gamma and volatility expand. Evaluate the portfolio of sensitivities, liquidity, expiry, and settlement—not only the terminal payoff picture.

Implied volatility (IV) is the volatility input that reconciles a pricing model with the market premium. Different strikes form a smile or skew, reflecting asymmetric demand and tail pricing. Different expiries form a term structure, which can rise around scheduled events or stress.

Compare IV with a clearly defined realized-volatility estimate, but do not call one 'cheap' solely because it is lower or higher. The premium also reflects jumps, skew, liquidity, funding, hedging costs, and the distribution the market fears. Position construction must specify which part of the surface it expresses.