Futures Risks Explained Honestly | How Do Futures Work?

The main risk of futures is leverage: a small deposit controls a large position, so ordinary price moves produce large gains or losses relative to the money in the account, and a bad move can cost more than everything you deposited. Futures also carry risks that people new to them rarely expect: prices can jump past your stop overnight, markets can lock at their limits, margin requirements can rise without warning, and in rare cases prices can go negative.

In short: With futures you are responsible for the full gain or loss on the contract’s entire notional value, not just on the margin you posted. Your broker can demand more money at any time and can close your positions if you do not pay. Losses beyond your account balance become a debt you owe. Small contracts reduce the dollar size of the risk but not the percentage risk. None of these risks is exotic; each has hit real traders, sometimes in a single day.

Risk 1: leverage, and what it really means

A futures contract has a notional value: the total value of the commodity or index it represents. You do not pay that amount. You post initial margin, a performance bond set by the clearing house (and often raised by your broker) at a small fraction of notional, sized to the market’s recent volatility.

Worked example: E-mini S&P 500

Real spec: the E-mini S&P 500 is $50 times the index; a tick is 0.25 points, worth $12.50. Index level and margin are illustrative. Margins change frequently; check CME Group’s current figures.

Index level: 6,000
Notional value: 6,000 x $50 = $300,000
Suppose initial margin is $25,000 (illustrative)
Effective leverage: $300,000 / $25,000 = 12 to 1

Now look at ordinary moves:

Index move	Points	P&L per contract	As % of $25,000 margin
0.5%	30	$1,500	6%
1%	60	$3,000	12%
3%	180	$9,000	36%
7%	420	$21,000	84%
10%	600	$30,000	120%

A 1% day, which happens often, moves the account by 12% of the margin. A 10% move, which is rare but has happened, wipes out more than the entire deposit.

Smaller contracts, same percentage risk

The Micro E-mini S&P 500 is $5 times the index, one-tenth the size. At 6,000 the notional value is $30,000 and a 1% move is $300. The dollars are smaller, but if you post one-tenth the margin, the percentage hit to your account is identical. A trader who buys ten micros has the same exposure as one E-mini. This is explored in micro futures explained.

Risk 2: losing more than you deposited

Futures accounts are settled daily. If losses push your account below the maintenance margin, you get a margin call and must add funds, usually promptly. If losses exceed the whole balance, the account goes negative and you owe the difference to your broker. Customer agreements make this explicit.

The most dramatic recent example is April 20, 2020, when the May 2020 WTI crude oil contract settled at -$37.63 per barrel, according to the CFTC staff report. It had closed at $18.27 on the previous trading day.

Real spec: WTI is 1,000 barrels per contract.

Change: -$37.63 - $18.27 = -$55.90 per barrel
Loss on one long contract in one trading day: $55.90 x 1,000 = $55,900

A trader who had posted a few thousand dollars of margin on that contract could end the day owing tens of thousands of dollars. In a 2021 order, the CFTC found that one large broker, Interactive Brokers, had not prepared its systems for negative prices, and that hundreds of its customer accounts holding long positions into settlement suffered losses the firm initially estimated at more than $82.57 million; the firm compensated customers and paid a $1.75 million penalty. The full story is in negative oil prices in April 2020.

Risk 3: gaps and stops that do not protect you

Futures trade nearly 24 hours on weekdays, but there are still daily breaks, weekends, and holidays, and news does not wait. When the market reopens far from where it closed, a stop order triggers at the first available price, which may be far beyond your stop.

Example: you are long one E-mini at 6,000 with a sell stop at 5,970 (a planned loss of 30 points, $1,500). The market opens Sunday evening at 5,880.

Fill near 5,880: loss = 120 points x $50 = $6,000, four times what you planned.

Stop-limit orders avoid the bad fill but may not fill at all. Order types and their trade-offs are covered in futures trading hours and order types.

Risk 4: limit moves and halts

Many contracts have daily price limits. When a market hits its limit and stays there (“limit locked”), trading may effectively stop at that price. If the market is against you, you cannot get out, and the next day it may open limit against you again. Equity index futures have overnight limits of 7% up or down and coordinated halts with the stock market. Details are in limit moves and circuit breakers.

Risk 5: liquidity

The front-month contract of a major market is usually very liquid. Deferred months, smaller contracts, and some commodities are not. In a thin market:

The gap between the best bid and best offer (the spread) is wider
Large orders move the price
In stress, buyers or sellers can disappear

The CFTC staff report on April 20, 2020 noted that limit order book data showed “a decrease in liquidity in the May Contract” that “started well before April 20,” and that the price moves between 1:00 p.m. ET and the 2:30 p.m. ET settlement were “exceptional.”

Risk 6: margin increases

Exchanges set minimum margin and can raise it at short notice when volatility rises. Brokers can set their own “house” margin above the exchange minimum and change it faster still. A position that was comfortably funded on Monday can require substantially more on Tuesday, even if the price has not moved against you. If you cannot meet the call, the broker can liquidate your position, often without asking first and at whatever price is available. How margin works day to day is covered in how futures margin works.

Risk 7: delivery

Many contracts are physically settled. If you hold a long position in some contracts past the first notice day, you can be assigned delivery of the actual commodity. Retail brokers generally require clients to close or roll positions before then and may liquidate positions that are not closed. Holding into delivery without the ability to take it is how some traders end up in forced, expensive liquidations, as April 2020 showed.

Risk 8: your broker and the system around it

The clearing house guarantees trades between its members, but your relationship is with your futures broker (a futures commission merchant in the US). If the broker fails and customer funds are missing, recovery can take time. When MF Global collapsed in 2011, the bankruptcy trustee reported a shortfall of about $1.6 billion in customer property; customers were eventually repaid in full, but only after years. Futures accounts are not covered by SIPC in the US. Canadian protection under CIPF works differently. The protections are explained in how futures customer funds are protected.

Risk 9: operational and technical risk

Platforms can freeze in fast markets, data feeds can lag, and brokers’ risk systems can behave unexpectedly. The CFTC found that in April 2020, at one broker, negative prices were not displayed to customers and customers could not enter negative-priced limit orders. Risk you cannot see on your screen is still risk.

Risk 10: the behavioural risks

Leverage makes it easy to trade too large. Daily settlement makes losses feel immediate, which can lead to doubling down, removing stops, or chasing losses. None of these is unique to futures, but leverage magnifies their cost.

A summary table

Risk	What it looks like	What it can cost
Leverage	1% index move = 12% of margin (example above)	Full margin and more
Losses beyond deposit	Account goes negative	A debt to the broker
Gaps	Opens past your stop	Several times the planned loss
Limit moves	Market locked against you	Cannot exit for one or more days
Liquidity	Wide spreads, few bids	Poor fills, especially in stress
Margin increases	Higher requirement overnight	Forced liquidation
Delivery	Holding a physical contract too long	Forced liquidation or delivery costs
Broker failure	Customer funds tied up	Delays, possible losses
Operational	Platform or system errors	Unexpected positions or fills

The short version

Futures risk starts with leverage: you carry the gain or loss on the full notional value while posting only a fraction of it, so an ordinary move can consume a large part of your margin and an extreme one can exceed it. Add gaps that skip stops, limit-locked markets, thin liquidity, sudden margin increases, delivery obligations, and the possibility of broker or system failure. Smaller contracts shrink the dollars but not the percentages. Understanding these mechanics is the first step; none of this is a recommendation to trade or not to trade.