What a 68¢ contract actually costs

A binary contract cannot be sliced. $100 divided by 68¢ is 147.06 contracts, and there is no such thing as 0.06 of a contract, so the position is 147 contracts. Those cost 147 × $0.68 = $99.96, leaving 4¢ sitting unspent.

If the contract settles YES, the payout is 147 × $1.00 = $147.00, and the profit is $147.00 − $99.96 = $47.04. If it settles NO, the contracts are worth nothing and the loss is the full $99.96 committed.

The 4¢ is trivial and the habit it teaches is not. Return has to be measured against what was committed, not against what you intended to spend: $47.04 on $99.96 is 47.06%, and computing it as 47.04 ÷ 100 would understate slightly here but overstate in other cases — a profit calculated as stake ÷ price − stake is wrong on every trade where the division is not exact, and wrong in the direction that flatters the trade. On larger positions and lower prices the discrepancy grows.

Buying at 68¢ risks 68¢ to make 32¢ per contract. For that to break even over many independent trades, you need to be right about 68% of the time — the price and the required win rate are the same number, which is the neatest property this instrument has.

It reframes what “expensive” means. A 90¢ contract is not expensive because 90¢ is a lot of money; it is expensive because it demands a 90% hit rate, and being right nine times out of ten is difficult. A 10¢ contract only needs to come in one time in ten, which is why a string of losses on cheap contracts is not evidence of anything much.

Adding costs raises the bar. If crossing the spread and paying a fee amount to roughly two points, a 68¢ contract needs closer to a 70% hit rate to break even. That is the number to compare against your own confidence, not the price on the screen.

At 10¢, $100 buys exactly 1,000 contracts for $100.00 with nothing left over. A YES settlement pays $1,000 and the profit is $900 — nine times the money committed. A NO settlement loses the whole $100.

Same money, same instrument, completely different shape. The 68¢ position wins small and often; the 10¢ position loses most of the time and pays for it in the cases where it does not. Neither is better. What changes is the distribution of outcomes, and therefore how many trades it takes before your results say anything about your judgement rather than about luck.

Both positions also have the same maximum loss: everything committed. That is the number worth writing down, because it is the only figure in this whole calculation that is certain.

The payout figure is the one that draws the eye and the committed figure is the one that matters. A position’s risk is the whole amount committed, because a binary contract really can go to zero — there is no partial recovery in a $1-or-nothing instrument, and no stop-loss that helps if the market gaps.

This site does not tell you what fraction of an account to commit, because that is a decision about your own finances and we are not qualified to make it. What is worth saying is that the arithmetic above is the input to that decision: the committed amount is what is at stake, the break-even win rate is what the price demands, and the number of contracts is what determines both.

One more consideration that gets overlooked: committed capital is locked until settlement. A contract resolving in eighteen months ties up money for eighteen months, and the fact that the position looks safe does not make the capital available. Sizing a portfolio of long-dated contracts as though the money were liquid is a common and expensive mistake.