# What Does "Buy to Open" Mean in Options Trading? A Comprehensive Guide

> **Definition**
>
> "Buy to open" establishes a new long position when a trader purchases a call or put option.

## What Is Buy to Open?

"Buy-to open" is an [options](https://www.investopedia.com/terms/o/option.asp) trading order used to establish a new long [call](https://www.investopedia.com/terms/c/calloption.asp) or [put](https://www.investopedia.com/terms/p/putoption.asp) position, signaling the creation of a position rather than the closure of an existing one. It's commonly used in strategies like heading and spreading. A buy-to-open order is later closed with a [sell-to-close](https://www.investopedia.com/terms/s/selltoclose.asp) order, while new short positions are initiated with sell-to-open orders and exited with buy-to-close orders.

### Key Takeaways

*   "Buy-to-open" is used to establish a new long call or put position in options trading.
*   A buy-to-open order signals a new position, while "sell to close" is used to exit it.
*   Options traders can engage in spreading or hedging using buy-to-open orders to offset existing positions.
*   Buy-to-open orders may not execute during certain market conditions, like trading halts or delisting.
*   Option sellers can buy to close positions to secure profits or limit potential losses before expiration.

## How Buy to Open Orders Work in Options Trading

The buy and sell terminology for options trading is not as straightforward as it is for stock trading. Instead of merely placing a buy or sell order as they would for stocks, options [traders](https://www.investopedia.com/terms/t/trader.asp) must choose among "buy to open," "buy to close," "sell to open," and "sell to close."

A buy-to-open position may indicate to market participants that the trader initiating the order believes something about the market or has an ax to grind. That is particularly true if the order is large. However, that does not have to be the case. In fact, options traders frequently engage in [spreading](https://www.investopedia.com/terms/s/spreadoption.asp) or [hedging](https://www.investopedia.com/terms/h/hedge.asp) activities where a buy to open may actually offset existing positions.

> **Important**
>
> Buying an out-of-the-money put option when purchasing a stock helps reduce risk.

The exchange may declare that only closing orders can take place during specific market conditions, so a buy-to-open order might not execute. That could happen if a stock with options available is scheduled for [delisting](https://www.investopedia.com/terms/d/delisting.asp) or the exchange halts trading of the stock for an extended time.

## Applying "Buy to Open" in Stock Trading

The term "buy to open" also applies to stocks. When an investor decides to establish a new position in a particular stock, the first buy transaction is considered buy to open because it opens the position.

Opening the position makes the stock a part of the portfolio. The position stays open until all shares are sold. That is known as selling to close because it closes the position. Selling a partial position means only some of the stocks were sold. A position closes when no shares of a stock remain in the portfolio.

Buy-to-close orders also come into play when covering a [short-sell](https://www.investopedia.com/terms/s/shortsale.asp) position. A short-sell position borrows the shares through the broker and is closed out by buying back the shares in the open market. The last transaction to completely close out the position is known as the buy-to-close order. This transaction removes the exposure completely. The intent is to buy back the shares at a lower price to generate a profit from the difference of the short-sell price and the buy-to-close price.

If the share price jumps, a short-seller might need to buy to close at a loss to avoid bigger losses. In a worst-case scenario, the broker may execute a forced liquidation as a result of a [margin call](https://www.investopedia.com/terms/m/margincall.asp). Then, the broker would demand that the investor place money in the margin account due to a shortfall. That would generate a [buy-to-cover](https://www.investopedia.com/terms/b/buytocover.asp) order to close out the position at a loss due to insufficient account equity.

## Comparing Buy to Open and Buy to Close Strategies

To profit from price changes in the underlying security, an investor must buy to open a call or a put. Buying to open starts a long options position, letting a speculator aim for large profits with low risk. However, the security must move correctly and quickly, or the option can lose value due to [time decay](https://www.investopedia.com/terms/t/timedecay.asp).

[Option sellers](https://www.investopedia.com/articles/optioninvestor/09/selling-options.asp) benefit from time decay but might still choose to buy to close. An investor selling options is bound by their terms until they expire. Price changes in the security can let options sellers take profits early or cut losses.

Suppose someone sells [at the money](https://www.investopedia.com/terms/a/atthemoney.asp) puts lasting for a year, and then the underlying stock goes up 10% after three months. The options seller can buy to close and quickly secure most of the profits. If the stock falls 10% after three months instead, the options seller will have to pay more to buy to close and limit potential losses.

## Example: Executing a Buy to Open Order

Suppose a trader has done some analysis and believes that the price of XYZ stock will go from $40 to $60 in the next year. The trader could buy to open a call for XYZ. The [strike price](https://www.investopedia.com/terms/s/strikeprice.asp) might be $50 with an [expiration date](https://www.investopedia.com/terms/e/expirationdate.asp) about a year from now.

## The Bottom Line

Buy-to-open establishes a new long call or put position in options, unlike sell-to-close, which exits it, or buy-to-close, used by sellers to limit losses or take profits. It offers high potential gains with limited losses but risks expiring worthless if markets don't move favorably. Exchanges may restrict these orders during halts or delistings, and the term also applies to starting stock positions.