Why trade futures if you have options
Yes, from the point-of-view to the end speculator/investor in stocks, it is ludicrous to take on liabilities when you don't have to.  That's why single-stock options are far more liquid than single-stock futures. However, if you are a farmer with a huge mortgage depending upon the chaos of agricultural markets which are extremely volatile, a different structure might appeal to you.  You could long your inputs while shorting your outputs, locking in a profit.  That profit is probably lower than what one could expect over the long run without hedging, but it will surely be less volatile. Here's where the advantage of futures come in for that kind of structure: the margin on the longs and shorts can offset each other, forcing the farmer to have to put up much less of one's own money to hedge.  With options, this is not the case. Also, the gross margin between the inputs rarely fluctuate to an unmanageable degree, so if your shorts rise faster than your longs, you'll only have to post margin in the amount of the change in the net of the longs and shorts. This is why while options on commodities exist to satisfy speculators, futures are the most liquid. That question makes assumptions that don't hold in general As to why to deal with futures:  Well, there's just one contract per maturity date, not a whole chain of contracts (options come at different strike prices).  That in turn means that all the liquidity is in that one contract and not scattered across the chain. Then, moreover, it depends what underlying contracts you're talking about.  Often, especially when dealing with commodities, there is no option chain on the spot product but only options on the futures contracts. In summary, the question is somewhat bogus.  Options and futures evolved historically and independently, and were not meant to be substitutable by one another.  So their rights and obligations are just a historical by-product and not their defining feature.  I suggest you refine it to a specific asset class. "With options you pay for a premium which relates to the expected (so-called ""implied"" volatility). With futures, there is no assumption about the volatility of an underlying stock. In general, when trading options you trade the direction and future expected volatility of an underlying while futures are directional trades only."
Can someone please explain how traders and investors use this price difference to trade? People use the price difference for small arbitrage between the futures and spot markets, where the larger spreads are reflected in the options markets. The spread in the options market dictates the VIX which many investors also use in their decision making process.  And most importantly how the futures market affects subsequent moves in the stock market? The futures market effects the stock market where large contract holders move the entire futures price. This causes reactionary moves amongst all of the aforementioned arbitragers, who are hedged between the futures and spot markets. With the /ES this is reflected down to actual individual stocks based on their weightings in the S&P 500 index. Many of those stocks have smaller companies that are also linked to them, such as a widget manufacturer for a gigantic ACME corporation listed in the S&P 500. The equation you show is correct, you've simply pointed out that you understand that you buy at the 'ask' price, and later sell at the 'bid.' There is no bid/ask on the S&P, as you can't trade it directly.  You have a few alternatives, however - you can trade SPY, the (most well known) S&P ETF whose price reflects 1/10 the value or VOO (Vanguard's offering) as well as others. Each of these ETFs gives you a bid/ask during market hours. They trade like a stock, have shares that are reasonably priced, and are optionable.  To trade the index itself, you need to trade the futures. S&P 500 Futures and Options is the CME Group's brief info guide on standard and mini contracts.  Welcome to SE. "Though you're looking to repeat this review with multiple securities and events at different times, I've taken liberty in assuming you are not looking to conduct backtests with hundreds of events.  I've answered below assuming it's an ad hoc review for a single event pertaining to one security. Had the event occurred more recently, your full-service broker could often get it for you for free.  Even some discount brokers will offer it so.  If the stock and its options were actively traded, you can request ""time and sales,"" or ""TNS,"" data for the dates you have in mind.  If not active, then request ""time and quotes,"" or ""TNQ"" data. If the event happened long ago, as seems to be the case, then your choices become much more limited and possibly costly.  Below are some suggestions: Wall Street Journal and Investors' Business Daily print copies have daily stock options trading data.  They are best for trading data on actively traded options.  Since the event sounds like it was a major one for the company, it may have been actively traded that day and hence reported in the papers' listings.  Some of the print pages have been digitized; otherwise you'll need to review the archived printed copies. Bloomberg has these data and access to them will depend on whether the account you use has that particular subscription.  I've used it to get detailed equity trading data on defunct and delisted companies on specific dates and times and for and futures trading data.  If you don't have personal access to Bloomberg, as many do not, you can try to request access from a public, commercial or business school library. The stock options exchanges sell their data; some strictly to resellers and others to anyone willing to pay.  If you know which exchange(s) the options traded on, you can contact the exchange's market data services department and request TNS and / or TNQ data and a list of resellers, as the resellers may be cheaper for single queries." "I think you have a really good idea, kudos to it. It will be difficult to break eve, and while you stressed the fact that you are ready to part with this money, it would be interesting for you not to part with this money just for the sake of trading. You will be frustrated because you are ""winning"" and breaking even or even losing money in the process. Think about that. For somebody with limited experience the derivatives market carries a very high risk also as everything in this matters carries high or very high yield. Trading futures on margin can actually work but I think you will need a bit more money. Check the mini contracts of infinity futures and calculate the commissions. You will be paying more for a contract, yes. you will need more money for your maintenance margin, yes, but if you day-trade and you have a cheapo broker this will be substantially lower. Gold contracts pay about 10 to 1 so a mini contract of 33 ounces will pay you 33 dollars per 1 dollar move. Your commissions will be about 4/5 usd in a discount broker and you will need to pay some exchange house fees, maybe about 15% of your trade will be fees. Check the contract specs and costs. As somebody said before, they wouldn't recommend trading on margin but with an account of that side I wouldn't know anything else. Trading physical gold on margin could also be an option. Just my 2 cents." In the equity world, if a stock trades at 110 and is going to pay a dividend of 10 in a few days, an option expiring after the ex date would take the dividend into account and would trade as if the stock were trading at 100. (Negative) interest rates may also lead to a similar effect. In the commodity world the cost of carry needs to be taken into account. An additional way to get a better grip on the mechanics of what you're looking to do is to use a paper trading tool. For example, thinkorswim gives you $200k in virtual money to trade with- money you don't have to worry about as you might initially make mistakes in trading futures. As mentioned above, each product has it's own pricing and trading options on futures (derivatives of derivatives) is even more confusing, so you'll be well-served by a risk-free learning tool. When you buy a call option, you transfer the risk to the owner of the asset. They are risking losing out on gains that may accumulate in addition to the strike price and paid premium. For example, if you buy a $25 call option on stock XYZ for $1 per contract, then any additional gain above $26 per share of XYZ is missed out on by the owner of the stock and solely benefits the option holder. "Of the two, an option is a more reliable but more expensive means to get rid of a stock. As sdg said, a put option is basically an insurance policy on the stock; you pay a certain price for the contract itself, which locks in a sale price up to a particular future date. If the stock depreciates significantly, you exercise the option and get the contract price; otherwise you let the contract expire and keep the stock. Long-term, these are bad bets as each expired contract will offset earnings, but if you foresee a near-term steep drop in the stock price but aren't quite sure, a put option is good peace of mind. A sell stop order is generally cheaper, but less reliable. You set a trigger price, say a loss of 10% of the stock's current value. If that threshold is reached, the stop order becomes a sell order and the broker will sell the stock on the market, take his commission (or a fixed price depending on your broker) and you get the rest. However, there has to be a buyer willing to buy at that price at the moment the trigger fires; if a stock has lost 10% rapidly, it's probably on the way down hard, and the order might not complete until you realize a 12% loss, or a 15%, or even 20%. A sell stop limit (a combination stop order and limit order) allows you to say that you want to sell if the stock drops to $X, but not sell if it drops below $X-Y. This allows you to limit realized losses by determining a band within which it should be sold, and not to sell above or below that price. These are cheaper because you only pay for the order if it is executed successfully; if you never need it, it's free (or very cheap; some brokers will charge a token service fee to maintain a stop or stop limit). However, if the price drops very quickly or you specify too narrow a band, the stock can drop through that band too quickly to execute the sell order and you end up with a severely depreciated stock and an unexercised order. This can happen if the company whose stock you own buys another company; VERY quickly, both stocks will adjust, the buying company will often plummet inside a few seconds after news of the merger is announced, based on the steep drop in working capital and/or the infusion of a large amount of new stock in the buying company to cover the equity of the purchased company. You end up with devalued stock and a worthless option (but one company buying another is not usually reason to sell; if the purchase is a good idea, their stock will recover). Another option which may be useful to you is a swaption; this basically amounts to buying a put option on one financial instrument and a call on another, rolled into one option contract specifying a swap. This allows you to pick something you think would rise if your stock fell and exchange your stock for it at your option. For example, say the stock on which you buy this swaption is an airline stock, and you contract the option to swap for oil. If oil surges, the airline's stock will tank sharply, and you win both ways (avoiding loss and realizing a gain). You'd also win if either half of this option realized a gain over the option price; oil could surge or the airline could tank and you could win. You could even do this ""naked"" since its your option; if the airline's stock tanks, you buy it at the crashed price to exercise the option and then do so. The downside is a higher option cost; the seller will be no fool, so if your position appears to be likely, anyone who'd bet against you by selling you this option will want a pretty high return."