Sizing around earnings weeks

Unlike a Fed decision or a jobs report, which move the whole market, a single-stock earnings announcement is a scheduled event that can move one specific name hard, regardless of what NDX or SPX are doing that day. If you trade single names like AMD, NVDA, AVGO, or SNDK alongside index spreads, earnings week is where company-specific risk shows up most clearly.

The date itself is known well in advance. What isn't known is the outcome, or the size of the reaction. A stock can beat expectations on every metric and still fall, or miss and still rally, because the move is driven by what was already priced in, not just the headline numbers. That unpredictability is exactly why earnings deserve a deliberate sizing decision rather than a default one.

A simple example. Say a stock trades a normal daily range of 1-2% most weeks. Heading into its earnings date, the options market might be pricing in an expected move of 6-8% overnight. A spread sized for the normal range can be badly under-sized for the earnings range, even though nothing about your process changed.

The IV pattern around earnings

Implied volatility on single-stock options typically climbs in the days and weeks heading into an earnings date, as the market prices in the uncertainty of the announcement. Right after the report, once the uncertainty resolves, IV usually drops sharply, an effect sometimes called "IV crush." That pattern was introduced in the earlier lesson on vega and implied volatility, and it's worth remembering here: a position held through earnings isn't just exposed to the price gap, it's exposed to a rapid volatility change at the same time.

Making the decision on purpose

There's no single right answer for how to handle earnings, and this isn't a recommendation to trade one way or the other on any specific name. Many traders choose to avoid holding short premium through an earnings announcement entirely, closing or letting positions expire beforehand. Others deliberately reduce position size going in, accepting a smaller position in exchange for exposure to a binary, gap-risk event that can't be sized away completely, only sized down.

What matters is that the decision gets made consciously. An earnings gap doesn't check whether you meant to be exposed to it. A spread that's fine on a normal Tuesday can behave very differently if a report lands overnight and the stock opens far outside your strikes the next morning.

Rule of thumb. Know which of your open positions have an earnings date inside their expiry window, and make the sizing decision on purpose, whether that's avoiding it, reducing size, or accepting the exposure deliberately, rather than by accident.

What this doesn't mean

It doesn't mean earnings positions are always a bad idea. Some traders build strategies specifically around the elevated premium earnings weeks offer.
It doesn't mean you can fully size away binary risk. A defined-risk spread caps the loss, but the probability of landing near that cap goes up materially around an earnings gap.
It doesn't mean every stock's earnings reaction behaves the same way. Historical reaction size varies a lot by name, and past reactions never guarantee future ones.