Do the proceeds from selling an option immediately convert to buying power in a margin account?
"Yes.  I heard back from a couple brokerages that gave detailed responses. Specifically: In a Margin account, there are no SEC trade settlement rules, which means there is no risk of any free ride violations. The SEC has a FAQ page on free-riding, which states that it applies specifically to cash accounts. This led me to dig up the text on Regulation T which gives the ""free-riding"" rule in §220.8(c), which is titled ""90 day freeze"". §220.8 is the section on cash accounts. Nothing in the sections on margin accounts mentions such a settlement restriction. From the Wikipedia page on Free Riding, the margin agreement implicitly covers settlement. ""Buying Power"" doesn't seem to be a Regulation T thing, but it's something that the brokerages that I've seen use to state how much purchasing power a client has. Given the response from the brokerage, above, and my reading of Regulation T and the relevant Wikipedia page, proceeds from the sale of any security in a margin account are available immediately for reinvestment. Settlement is covered implicitly by margin; i.e. it doesn't detract from buying power. Additionally, I have personally been making these types of trades over the last year. In a sub-$25K margin account, proceeds are immediately available. The only thing I still have to look out for is running into the day-trading rules." I'd say yes, and hope that my anecdotal evidence serves as proof. My IRA is not a margin account. It can't be.  I attempt to create a covered call, buying a stock at say $20, and selling a call for $4, for net $16 cost. The account only had $1610 at the time, and the trades go through just fine. Yes, I needed to enter as a limit order, at the same time, a single order with the $16 debit limit.  If this is not enough proof, I'd be curious - why not? The option proceeds must clear, of course, which it does.
"So, yes, you may be having the inevitable epiphany where you realize that options can synthetically replicate the same risk profile of owning stock outright. Allowing you to manipulate risk and circumvent margin requirement differences amongst asset classes. Naked short puts are analogous to a covered call, but may have different (lesser) margin requirements. This allows you to increase your risk, and the broker has to account for that. The broker's clientele might not understand all the risks associated with that much leverage and so may simply consider it risky ""for your protection""" Yes, via a margin account, one can trade or transfer on unsettled funds. These are tight regulations that begin with the Federal Reserve, extend to FINRA, and downward. In a cash account, this is not possible. Since speed is a necessity, a margin account can actually be approved nearly instantly. You're trying to mitigate the risk of having your investments wiped out by fraud committed by your broker by using margin loans to buy stock secured by other, non-cash assets in your account. The solution that you are proposing does not make any sense at all. You mitigate a very low probability/high impact risk by doing something that comes with a high probability/medium impact risk.  In addition to interest costs, holding stocks on margin subjects you to the very real risk of being forced to sell assets at inopportune times to meet margin calls. Given the volatility that the markets are experiencing in 2011, there is a high risk that some irrational decision in Greece could wipe you out. If I were worried about this, I would: If you have enough money that SIPC protection limits are an issue, you desperately need a financial adviser. Do not implement any strategy involving margin loans until you talk to a qualified adviser. The broker would give you a margin call and get you to deposit more funds into your account. They wouldn't wait for the stock price to reach $30, but would take this action much earlier. More over it is very unrealistic for any stock to go up 275% over a few hours, and if the stock was this volatile the broker would be asking for a higher margin to start with. What I am really worried about is that if there were any situation like this you are not considering what you would do as part of your risk management strategy. Before writing the option you should already have an exit point at which you would buy back the option to limit your losses. With margin accounts you will be able to use the proceeds from a closed trade INSTANTLY.  Without margin accounts this is the time you close the trade + 3 business days for clearing. In practice this means 4-5 days if there is a weekend or holiday involved between those 3 business days. This ties up your capital for an unfavorable amount of time, where as a margin account lets you continue to use the capital over and over again for more opportunities. You CANNOT sell to open a position in cash accounts. This means no short selling. This means no covered calls or spreads and MANY other strategies. These are the real differences you'll notice in a margin account vs a cash account.  Then there are the myriad of regulations that dictate how much cash you should keep in your account for any margin position. Depends on the stock involved, but for the most part brokerages allow you gain entry at 50%, meaning you can short twice the cash on hand you have.   Going forward, you need to maintain 30%, so on a $10,000 short, you'd have to maintain $3000 in your account. Example, an account with $5000 cash - You can short $10,000 securities.  Let say 100 shares of xyz at $100 per share. After trade settles, you won't receive a margin call until your balance falls to $3000, probably right around the time xyz rises to $120 per share.  Riskier stocks will have higher margin maintenance requirements - leveraged vehicles like FAS/FAZ (triple leveraged) require 90% margin (3x30%) if they are allowed to be 'shorted' at all. Different brokerages have different house rules for margin requirements and margin calls.  You will likely get a margin call giving you a small amount of time to deposit the required funds to bring your account balance up to the required margin requirements.  In reality, a stock that falls from $50 to $4 in a short period will probably become unmarginable.  In short, yes, you will owe the broker for the loss. "Simplest way to answer this is that on margin, one is using borrowed assets and thus there are strings that come with doing that. Thus, if the amount of equity left gets too low, the broker has a legal obligation to close the position which can be selling purchased shares or buying back borrowed shares depending on if this is a long or short position respectively. Investopedia has an example that they walk through as the call is where you are asked to either put in more money to the account or the position may be closed because the broker wants their money back. What is Maintenance Margin? A maintenance margin is the required   amount of securities an investor must hold in his account if he either   purchases shares on margin, or if he sells shares short. If an   investor's margin balance falls below the set maintenance margin, the   investor would then need to contribute additional funds to the account   or liquidate stocks in the account to bring the account back to the   initial margin requirement. This request is known as a margin call. As discussed previously, the Federal Reserve Board sets the initial   margin requirement (currently at 50%). The Federal Reserve Board also   sets the maintenance margin. The maintenance margin, the amount of   equity an investor needs to hold in his account if he buys stock on   margin or sells shares short, is 25%. Keep in mind, however, that this   25% level is the minimum level set, brokerage firms can increase, but   not decrease this level as they desire. Example: Determining when a margin call would occur. Assume that an   investor had purchased 500 shares of Newco's stock. The shares were   trading at $50 when the transaction was executed. The initial margin   requirement on the account was 70% and the maintenance margin is 30%.   Assume no transaction costs. Determine the price at which the investor   will receive a margin call. Answer: Calculate the price as follows: $50 (1- 0.70) = $21.43 1 - 0.30 A margin call would be received when the price of Newco's stock fell   below $21.43 per share. At that time, the investor would either need   to deposit additional funds or liquidate shares to satisfy the initial   margin requirement. Most people don't want ""Margin Calls"" but stocks may move in unexpected ways and this is where there are mechanisms to limit losses, especially for the brokerage firm that wants to make as much money as possible. Cancel what trade? No, the broker will close the position if the requirement isn't kept. Basically think of this as a way for the broker to get their money back if necessary while following federal rules. This would be selling in a long position or buying in a short sale situation. The Margin Investor walks through an example where an e-mail would be sent and if the requirement isn't met then the position gets exited as per the law." If I sell a covered call, on stock I own 100%, there is no risk of a margin call. The stock goes to zero, I'm still not ask to send in more money. But, if bought on margin, margin rules apply.  A naked put would require you to be able to buy the stock if put to you. As the price of the stock drops, you still need to be able to buy it at the put strike price.  Mark to market is just an expression describing how your positions are considered each day. Yes, Regulation T is specified as the equity percentage of assets. So, yes, one can buy double the amount of equity in initial buying power but no more.  A broker shouldn't even permit purchases that would violate margin regulation. Maintenance margin is at 25%, so equity must remain above 25% of the total or the brokerage will force liquidations. "But what happen if the stock price went high and then go down near expiry date? When you hold a short (sold) call option position that has an underlying price that is increasing, what will happen (in general) is that your net margin requirements will increase day by day.  Thus, you will be required to put up more money as margin to finance your position.  Margin money is simply a ""good faith"" deposit held by your broker.  It is not money that is debited as cash from the accounting ledger of your trading account, but is held by your broker to cover any potential losses that may arise when you finally settle you position.   Conversely, when the underlying share price is decreasing, the net margin requirements will tend to decrease day by day.   (Net margin is the net of ""Initial Margin"" and ""Variation Margin"".) As the expiry date approaches, the ""time value"" component of the option price will be decreasing." "The margin money you put up to fund a short position ($6000 in the example given) is simply a ""good faith"" deposit that is required by the broker in order to show that you are acting in good faith and fully intend to meet any potential losses that may occur.  This margin is normally called initial margin.  It is not an accounting item, meaning it is not debited from you cash account.  Rather, the broker simply segregates these funds so that you may not use them to fund other trading.  When you settle your position these funds are released from segregation.   In addition, there is a second type of margin, called variation margin, which must be maintained while holding a short position.  The variation margin is simply the running profit or loss being incurred on the short position.  In you example, if you sold 200 shares at $20 and the price went to $21, then your variation margin would be a debit of $200, while if the price went to $19, the variation margin would be a credit of $200.   The variation margin will be netted with the initial margin to give the total margin requirement ($6000 in this example).  Margin requirements are computed at the close of business on each trading day.  If you are showing a loss of $200 on the variation margin, then you will be required to put up an additional $200 of margin money in order to maintain the $6000 margin requirement - ($6000 - $200 = $5800, so you must add $200 to maintain $6000).  If you are showing a profit of $200, then $200 will be released from segregation - ($6000 + $200 = $6200, so $200 will be release from segregation leaving $6000 as required). When you settle your short position by buying back the shares, the margin monies will be release from segregation and the ledger postings to you cash account will be made according to whether you have made a profit or a loss.  So if you made a loss of $200 on the trade, then your account will be debited for $200 plus any applicable commissions.  If you made a profit of $200 on the trade then your account will be credited with $200 and debited with any applicable commissions." "He didn't sell in the ""normal"" way that most people think of when they hear the term ""sell."" He engaged in a (perfectly legitimate) technique known as short selling, in which he borrows shares from his broker and sells them immediately. He's betting that the price of the stock will drop so he can buy them back at a lower price to return the borrowed shares back to his broker. He gets to pocket the difference. He had about $37,000 of cash in his account. Since he borrowed ~8400 shares and sold them immediately at $2/share, he got $16,800 in cash and owed his broker 8400 shares. So, his net purchasing power at the time of the short sale was $37,000 + $16,800 - 4800 shares * $2/share. As the price of the stock changes, his purchasing power will change according to this equation. He's allowed to continue to borrow these 8400 shares as long as his purchasing power remains above 0. That is, the broker requires him to have enough cash on hand to buy back all of his borrowed shares at any given moment. If his purchasing power ever goes negative, he'll be subject to a margin call: the broker will make him either deposit cash into his account or close his positions (sell long positions or buy back short positions) until it's positive again. The stock jumped up to $13.85 the next morning before the market opened (during ""before-hours"" trading). His purchasing power at that time was $37,000 + $16,800 - 8400 shares * $13.85/share = -$62,540. Since his purchasing power was negative, he was subject to a margin call. By the time he got out, he had to pay $17.50/share to buy back the 8400 shares that he borrowed, making his purchasing power -$101,600. This $101,600 was money that he borrowed from his broker to buy back the shares to fulfill his margin call. His huge loss was from borrowing shares from his broker. Note that his maximum potential loss is unlimited, since there is no limit to how much a stock can grow. Evidently, he failed to grasp the most important concept of short selling, which is that he's borrowing stock from his broker and he's obligated to give that stock back whenever his broker wants, no matter what it costs him to fulfill that obligation." I think George's answer explains fairly well why the brokerages don't allow this - it's not an exchange rule, it's just that the brokerage has to have the shares to lend, and normally those shares come from people's margin, which is impossible on a non-marginable stock. To address the question of what the alternatives are, on popular stocks like SIRI, a deep In-The-Money put is a fairly accurate emulation of an actual short interest.  If you look at the options on SIRI you will see that a $3 (or higher) put has a delta of -$1, which is the same delta as an actual short share. You also don't have to worry about problems like margin calls when buying options.  The only thing you have to worry about is the expiration date, which isn't generally a major issue if you're buying in-the-money options... unless you're very wrong about the direction of the stock, in which case you could lose everything, but that's always a risk with penny stocks no matter how you trade them. At least with a put option, the maximum amount you can lose is whatever you spent on the contract.  With a short sale, a bull rush on the stock could potentially wipe out your entire margin.  That's why, when betting on downward motion in a microcap or penny stock, I actually prefer to use options.  Just be aware that option contracts can generally only move in increments of $0.05, and that your brokerage will probably impose a bid-ask spread of up to $0.10, so the share price has to move down at least 10 cents (or 10% on a roughly $1 stock like SIRI) for you to just break even; definitely don't attempt to use this as a day-trading tool and go for longer expirations if you can. This depends on a combination of factors: What are you charged (call it margin interest) to hold the position? How does this reduce your buying power and what are the opportunity costs? What are the transaction costs alternative ways to close the position? What are your risks (exposure while legging out) for alternative ways to close? Finally, where is the asset closing relative to the strike? Generally, If asset price is below the put strike then the call expires worthless and you need to exercise the put. If asset is above the call strike then put expires worthless and you'll likely get assigned.  Given this framework:  If margin interest is eating up your profit faster than you're earning theta (a convenient way to represent the time value) then you have some urgency and you need to exit that position before expiry. I would not exit the stock until the call is covered. Keep minimal risk at all times. If you are limited by the position's impact on your buying power and probable value of available opportunities is greater than the time decay you're earning then once again, you have some urgency about closing instead of unwinding at expiry. Same as above. Cover that call, before you ditch your hedge in the long stock. Playing the tradeoff game of expiration/exercise cost against open market transactions is tough. You need sub-penny commissions on stock (and I would say a lot of leverage) and most importantly you need options charges much lower than IB to make that kind of trading work. IB is the cheapest in the retail brokerage game, but those commissions aren't even close to what the traders are getting who are more than likely on the other side of your options trades.