SPYEQUITY
—NO QUOTE
Equities
Futures
% r
% q

Long Put Calculator

How this strategy works →
AssistantPRO
Type a trade in plain English. A fine-tuned model returns the symbol, structure, expiry and size — never a strike or a price.
RECORDED EXAMPLE1/3
“bull call spread on NVDA, 30 days, 2 contracts”
NVDAEQUITYBull Call Spread30d2×
Not a live answer. Captured from api.optionsandfuturescalculator.com on 2026-08-11 and replayed here — the assistant did not run just now. Type your own above and press Parse for a real one.
Trained on ES and NQ futures only — commodity roots are refused, not guessed.A bare futures directive (“Long NQ, 45 days”) often returns no parameters.Exercise style and averaging come from a keyword scan of your words.
Strategy47
Single-leg calls and puts are free
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Ticket
Averaging
Debit · 1 × 100—
Position · 0 legs
No legsSelect strikes from the option chain to build a position.
Exercise & Averaging
Exercise
Dividend yield is not modelled on this tree (drift is r − σ²/2). The strategy panel prices with a dividend yield; this panel does not.
Averaging
No resultPick a strike with a live quote to price the tree.
Saved
Nothing saved yetBuild a position, name it, and it will be here next time.
Probability Distribution
No distribution yetThe curve needs a live spot, an implied volatility off the option chain, and a real expiry. Add priced legs to draw it.
P&L matrixprice × date
price–
No grid yetAdd priced legs to compute P&L across price and date.
P&L surfaceprice × date × profit
Surface offTurn on 3D to see the position as a height field.
Option Chain
Outcome
No resultRun a calculation to see outcome, probability and Greeks.

A single put, bought for a debit that is also the worst case. Below the strike it gains as the underlying falls, and because a price stops at zero the profit is large but finite — unlike a call, whose upside has no such stop. It is bought either as an outright bearish position or, far more often, as cover for shares already held. What makes it expensive is that everyone wants it: demand for downside protection is persistent, so puts usually trade at higher implied volatility than the calls beside them. Set the strike and the expiry here and weigh the premium against the fall you are actually insuring against.

The full Long Put guide, worked example and FAQs →

Also one leg, but the order ticket matters more here than it looks: a put on a hard-to-borrow name can carry extra premium from the cost of the corresponding short. Strike selection is a trade-off against skew — moving one increment further out of the money buys meaningfully more convexity on an index than on a single stock, because index skew is steeper. For a hedge sized against a specific share count, round the contract count down rather than up; over-hedging turns protection into a second, unwanted short position.

Sizing and account notes

Sized against the premium paid when speculative, and against the shares actually held when it is a hedge — conflating the two is the most common sizing mistake, since a hedge should track share count, not conviction. Brokers generally require only a standard options-approval level for a long put, well below what a naked short put or a spread needs, which is part of why it is often the first multi-leg-adjacent structure a new account is approved for. A put purchased and closed within a year is short-term for tax purposes regardless of how long the underlying shares have been held.

Common mistake. The common mistake is sizing the put by how bearish the view feels rather than by the shares actually being hedged, which leaves a hedge that either under-covers a real position or speculates well beyond it.

At a glance

Legs
1
Market view
Bearish — directional, or a hedge
Opened for
Debit
What bounds the profit
Bounded: strike minus premium, if the stock goes to zero
What bounds the loss
Limited to the premium paid

The order ticket, from the worked example

#ActionInstrumentStrike
1BuyPut490

Payoff at expiry, across a price grid

Computed from the same strikes and net premium as the worked example above — not a simulation, the closed-form payoff evaluated at each price.

QQQ at expiryP&L
430$5060.00
450$3060.00
470$1060.00
490-$940.00
510-$940.00
530-$940.00

How this compares with related strategies

StrategyMarket viewOpened forLegs vs. this one
Bear Put SpreadBearish — moderate, defined rangeDebit+1
Protective PutBullish — hedgedDebit+1
Cash-Secured PutNeutral to bullish — income or acquisitionCreditsame
Long StraddleVolatility — direction-agnosticDebit+1