What STBT actually means

STBT stands for Sell Today, Buy Tomorrow. It describes a position that is sold (written, in the case of options, or shorted, in the case of futures) on one trading day and closed out – bought back – on the following trading day, rather than being squared off within the same session.

This is distinct from purely intraday trading, where every position is opened and closed within the same market session, with zero overnight exposure.

Why STBT exists as a distinct concept

Some setups genuinely benefit from carrying a position overnight – the day’s closing price action, momentum, and positioning can give a clearer read on likely next-day direction than trying to guess it fresh at the following morning’s open. A strategy built around STBT is deliberately using the prior session’s close as its information edge, rather than reacting to the next day’s opening tick.

How STBT works in options strategies

01

Establish direction late in the session

Rather than committing to a direction at market open, an STBT-based strategy waits to observe the day’s price action before deciding which side to sell.

02

Sell the position today

A position is sold (written) based on that late-session read, carrying it open overnight rather than squaring off same-day.

03

Carry overnight exposure

The position remains open through the close, meaning it’s exposed to any gap – up or down – at the next day’s opening.

04

Buy back (close) tomorrow

The position is bought back the next trading session, closing out the trade, typically with an independent stop-loss defined on the leg from the moment it was opened.

See a live STBT-based strategy

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STBT vs BTST: not the same thing

BTST (Buy Today, Sell Tomorrow) is the far more commonly discussed concept among Indian retail traders – buying a stock today and selling it the next day, before the shares are actually credited to your Demat account (relying on the T+1 settlement cycle). STBT is the mirror concept applied to selling/shorting rather than buying, and in the options and futures context, it isn’t constrained by settlement timing the way equity BTST is, since derivatives don’t require share delivery.

Risk considerations specific to STBT

The defining risk of any STBT position is the overnight gap – the difference between where the market closed and where it opens the next session. Unlike an intraday position, an STBT trade is fully exposed to any news, global market movement, or event that occurs after the close and before the next open, with no ability to react until the market reopens.

This is exactly why a disciplined STBT strategy defines a stop-loss on each leg independently at the time the position is opened, rather than deciding on an exit only after seeing how the next session’s gap plays out.

Frequently asked questions

Is STBT riskier than pure intraday trading?

It carries a different risk profile – specifically, overnight gap risk that intraday trading doesn’t have. Whether that makes it “riskier” depends on position sizing and stop-loss discipline, not the STBT structure alone.

Can STBT be used with stocks, not just options?

Yes, in principle, though equity short-selling in India carries its own regulatory constraints (including restrictions on naked short-selling) that don’t apply the same way in the derivatives segment.

Does STBT require more capital than intraday trading?

Overnight positions in F&O typically require holding margin at a different (often higher) rate than pure intraday positions, since the exchange treats overnight risk differently from same-day squared-off risk.