The Greeks, Explained Like an Engineer

The “Greeks” sound intimidating, but each is just a sensitivity — how much an option’s value moves when one thing changes. They fall straight out of the option-pricing framework^[1][2] and form the dashboard every serious desk watches^[3].

The four that matter

Delta — sensitivity to the underlying’s price (direction). Gamma — how fast delta itself changes (acceleration). Theta — value lost to the passage of time (decay). Vega — sensitivity to changes in implied volatility.

Gamma is the one that bites

Near expiration, gamma spikes: a small move in the underlying produces a large, accelerating move in the option. This is the mathematical reason 0DTE positions are so explosive — and why they cannot be managed by feel.

You don’t trade options. You manage a moving bundle of risks that happens to be quoted as a single price.

Theta and vega: the seller’s tailwind

Time decay (theta) works for the option seller and against the buyer, which is one mechanical source of the volatility risk premium. Vega measures exposure to shifts in implied volatility itself — the thing that makes the whole surface move.

Niro treats the Greeks as constraints, not vibes: defined-risk structures bound gamma and loss, exposures are monitored mechanically, and positions are managed to their exits automatically. The dashboard runs whether or not anyone is watching.