

Options Intraday Tips
Premium, decay and why a correct view can still lose
Options differ from every other intraday instrument in one decisive respect: being right about direction does not guarantee a profit. Premium responds to the passage of time and to changes in expected volatility as well as to movement in the underlying, and either can offset a correct directional view entirely.
This is the source of most losses among traders who arrive from cash or futures. The analysis that identified the direction was sound; the instrument chosen to express it introduced variables that the analysis never addressed.
What Determines Premium
An option’s price contains intrinsic value, which is the amount by which it is currently in the money, and time value, which is everything else. Time value reflects the possibility of favourable movement before expiry and reduces as that possibility narrows.
An option with no intrinsic value consists entirely of time value, and time value tends toward zero at expiry. Traders who buy such options because they are cheap are buying the component most certain to decline, which is precisely why they are cheap.
Decay Accelerates Near Expiry
The erosion of time value is not linear. It accelerates sharply as expiry approaches, and in the final sessions of a contract it can dominate everything else affecting the premium.
For an intraday buyer this means the underlying must move promptly and sufficiently. A position that is directionally correct but slow can lose money while the trader watches the underlying do exactly what was expected, which is a distinctive and demoralising way to be right.
Volatility Expectations Move Premiums Independently
Premium also reflects expected future volatility. When expectations rise, premiums increase across strikes; when they fall, premiums decline even if the underlying has not moved.
This produces a common failure around scheduled events. Traders buy options before an announcement, expecting a large move, and the announcement duly produces one — but the elevated expectation built into the premium collapses at the same time, and the position loses despite the direction being correct.
Selecting a Strike
Strike choice determines the trade-off between cost and responsiveness. Options far from the current price are inexpensive and require a large move to become valuable. Options at or near the current price cost more and respond more directly to movement.
For intraday purposes, strikes at or near the money generally respond more reliably to the moves an intraday method is designed to capture. Distant strikes appear economical and frequently expire worthless despite the underlying moving in the anticipated direction.
Choosing the Expiry
The nearest expiry offers the greatest sensitivity to movement and the fastest decay. A slightly longer-dated contract decays more slowly and responds less sharply, and it costs more.
Nearest-expiry contracts are popular precisely because small moves produce large percentage changes in premium. That works in both directions, and a position that can double can also lose most of its value within the same session on an ordinary move.
Liquidity Varies Enormously by Strike
Depth concentrates in strikes near the current price in the nearest expiry. Move away from those and spreads widen quickly, sometimes to the point where entering and exiting costs more than the anticipated gain.
Check the actual spread and depth at the specific strike before trading, not the volume of the underlying. An illiquid strike can be entered easily and exited only at a substantial concession, which is discovered at the worst moment.
Buying and Selling Are Not Mirror Images
An option buyer risks the premium paid and no more. An option seller receives the premium and accepts an obligation whose loss can far exceed it, which is why selling requires margin and continuous attention.
Selling benefits from decay and from falling volatility expectations, which makes it attractive in quiet conditions. The risk profile is fundamentally asymmetric: many small gains punctuated by occasional large losses. That structure requires strict position limits and defined exits rather than confidence in the frequency of small wins.
Direction Alone Is an Incomplete Plan
A workable options trade specifies more than a view. It states the expected size of the move, the timeframe within which it must occur, the strike and expiry chosen for that combination, and the exit conditions in both directions.
Without the size and timeframe, there is no basis for selecting a strike, and the selection ends up being made on price alone. The general planning framework applies here as elsewhere and is set out in our intraday tips overview.
Position Sizing With Premium at Risk
For buyers, the premium paid is the maximum loss, which makes sizing arithmetically simple: never commit more premium than you are prepared to lose entirely, because intraday options positions genuinely can lose most of their value.
The defined maximum loss encourages oversizing, since the amount looks small relative to the account. A sequence of such positions produces exactly the erosion the trader believed they had guarded against, and the limit should be a fixed fraction of capital per session rather than per trade.
Expiry-Day Behaviour
On expiry day, decay is at its most severe and price behaviour is influenced by concentrated positioning. Premiums can collapse rapidly, and moves in the underlying can appear technically unjustified because their cause is positional.
These sessions attract activity because small moves produce dramatic percentage changes. They are a distinct environment rather than an ordinary session with more movement, and the underlying index dynamics are covered in index intraday tips and Bank Nifty intraday tips.
Comparing With Simpler Instruments
Where the view is purely directional and the intention is intraday, a linear instrument frequently expresses it more reliably. Futures give near-linear exposure without decay, and cash-segment trading removes leverage entirely.
Options earn their complexity where the payoff structure is genuinely wanted — defined maximum loss for a buyer, or income from decay for a seller. The alternatives are described in futures intraday tips and equity intraday tips, with method comparisons in intraday trading strategies.
The Spread Is a Larger Cost Than It Appears
Option spreads are proportionally wide compared with the underlying. A premium quoted with a gap of a rupee or two between bid and offer represents a substantial percentage of a low-priced option, and that percentage is paid immediately on entry.
For a method that transacts frequently, this single cost can exceed brokerage and levies combined. Requiring a setup to clear the full round-trip cost — spread included, at the specific strike being traded — eliminates a large share of positions that would otherwise look attractive on the chart.
Percentage Moves Are Deceptive
A small absolute change in premium is a large percentage change when the premium is low. Traders read those percentages as evidence of a powerful method and size accordingly, without noticing that the same arithmetic applies in reverse.
An option that can gain a large fraction of its value on a modest move can lose the same fraction just as readily. Judge outcomes against capital committed rather than against premium, since percentage returns on a small premium describe the instrument’s sensitivity rather than the quality of the decision.
Have an Exit for Both Directions
Because premium can decline through decay alone, an options position needs a time-based exit as well as a price-based one. A trade that has not worked within the window the setup assumed should be closed even if the underlying has not invalidated the view.
Holding on because the direction may still arrive is how buyers watch a position decay to a fraction of its value while remaining convinced they were right. Defining the window before entry, and honouring it, removes the most common way intraday option buyers lose.
Records Should Capture the Reasoning
Log the underlying view, the expected move size and timeframe, the strike and expiry chosen, the premium paid and the spread at entry. Reviewing these together reveals whether losses came from direction, from strike selection, or from cost.
Most traders discover their directional analysis was reasonable and their instrument selection was not, which points at a specific and fixable problem. A structured starting sequence appears in intraday tips for beginners.
FAQs
Why did my option lose money when the direction was right?
Time decay, a fall in expected volatility, or a move too small for the strike chosen. Premium responds to more than direction alone.
Are cheap far-from-the-money options good value?
They are cheap because they are unlikely to become valuable. For intraday methods, strikes near the current price respond more reliably to realistic moves.
What happens to premiums after a scheduled event?
Elevated volatility expectations built into the premium typically collapse once the uncertainty resolves, which can produce a loss even when the underlying moves as anticipated.
Is selling options safer because most expire worthless?
No. Selling produces many small gains and occasional large losses, with obligations exceeding the premium received. It requires margin, strict limits and defined exits.
Which expiry suits intraday trading?
The nearest expiry responds most to movement and decays fastest. That sensitivity works in both directions, so size must account for rapid loss as well as rapid gain.
How much premium should be committed?
Only what you can lose entirely, capped as a fixed fraction of capital per session. A defined maximum loss encourages oversizing precisely because it looks small.
Should I use options for a simple directional view?
Often not. A linear instrument expresses direction without decay or volatility effects. Options earn their complexity when the payoff structure itself is what you want.