Alphabet Fell, Microsoft Rose: What Implied Moves Said Before Earnings

Quick Summary

Alphabet and Microsoft reported earnings after the close on Oct. 28, 2026. Early reports put Alphabet down about 8% after hours and Microsoft up about 4%, against option-implied moves of roughly 5.8% and below 5%. The article explains how an implied move is estimated from a straddle, why a headline beat or miss is not what options price, and how IV crush works. It also covers the risks of buying and selling options around earnings and stresses that after-hours figures are not closing prices.

Alphabet fell about 8% after hours on Oct. 28, 2026. Microsoft rose about 4%. Both had just reported earnings, and options markets had priced in a swing for each. That makes the evening a useful case study in what an "implied move" does and does not tell you.

Alphabet, Google's parent, and Microsoft reported after the close on Wednesday, and the stock reactions pointed in opposite directions.

What an implied move is

An implied move is the size of the price swing that option prices suggest the market expects around an event such as earnings. It describes the magnitude of the expected move, not its direction. It is a snapshot of market pricing, not a forecast.

A common back-of-the-envelope estimate works like this:

Add the cost of an at-the-money call and an at-the-money put. These are options with a strike price near the current stock price, and together they are called a straddle.
Choose options that expire just after the report.
Divide the total by the stock price.

Going into the reports, one secondary outlet, TokenPost, put Alphabet's implied move at about 5.8% and Microsoft's at below 5%. Different data providers calculate this number differently, so figures can vary by a point or more from one source to the next.

What happened after the bell

Alphabet

Third-quarter revenue was about $127.6 billion, up roughly 25% from a year earlier.
Google Cloud revenue was about $30.7 billion, more than double the year-earlier level.
Diluted earnings per share were $2.12, versus $2.87 a year earlier. Fortune reported that an $8.7 billion paper loss on equity investments (a loss on the books, not cash spent) reduced per-share earnings by about 55 cents.
Capital spending was about $51.4 billion, and free cash flow, the cash left after operating costs and investment, was negative by about $9.1 billion, according to TradingKey.
Shares fell about 8% in after-hours trading, according to Fortune and TradingKey. That is not a closing price, and extended-hours moves can change by the time the regular session ends.

Microsoft

Fiscal first-quarter revenue was about $92.3 billion, up 19%, with Azure cloud growth of more than 48%, according to SiliconANGLE.
The company guided to fiscal second-quarter revenue of $96 billion to $97.1 billion, and CFO Amy Hood said demand still exceeds supply.
Shares rose about 4% in after-hours trading.

Reading implied versus realized

Using those early numbers, Alphabet's roughly 8% after-hours drop was larger than the roughly 5.8% the options market implied. Microsoft's roughly 4% gain sat inside what its pricing suggested. Same night, same type of event, different outcomes relative to expectations.

Two cautions apply.

One night is a single observation. Implied moves are best thought of as a range of expectations, and realized moves land on either side of them across many reports.
Options do not price the headline "beat" or "miss." Alphabet's per-share figure was reduced partly by a non-operating investment loss, while the market's reaction appeared to center on cash flow and spending. Options traders were pricing the reaction, not the label.

Why the day after matters

Implied volatility, the market's expectation of future price swings, tends to be elevated before a known event and often falls once the news is out. That decline is commonly called an "IV crush." It can reduce the value of an option even when the stock moves in the expected direction, because the option's price included that event premium.

This is one reason buying options ahead of earnings is a high-risk approach: a position can lose most or all of its value if the move is smaller than the premium paid, or if volatility drops sharply. Selling options to collect that premium has the opposite risk, with potentially large losses if the stock moves far more than expected.

The takeaway

Implied moves are a useful vocabulary for understanding what the market is bracing for. They are not a promise about what will happen, and the numbers above come from early, time-stamped reports that may change once final closing prices are in.

This article is educational commentary on public market events, not personalized investment, trading, or tax advice.