KEYS

What the Historical Beat-Rate and Drift Numbers Actually Mean

Over the last eight reported quarters, KEYS has beaten consensus EPS in all eight, a 100% beat rate, with an average earnings surprise of 9%. That same period produced an average five-day price move, measured in the five trading days after the report, of 10.71%, with the drift direction classified as “up.” Those two figures together say the company has consistently cleared estimates and the post-report auction has generally carried the stock higher over the following week.

But the recent quarter-by-quarter numbers also show that a beat does not always translate into an immediate one-day lift. On 2026-05-19 KEYS reported actual EPS of $2.87 versus an estimate of $2.32, a 23.7% surprise, yet the stock moved -0.59% the next day and only 1.03% over the next five days. By contrast, on 2026-02-23 a smaller 8.5% beat — actual EPS $2.17 versus estimate $2.00 — produced a 23.05% next-day move and a 27.87% five-day move. The earlier 2025-11-24 beat (actual $1.91 vs. estimate $1.83, a 4.4% surprise) saw a 10.01% next-day gain and a 13.36% five-day gain, while 2025-08-19 (actual $1.72 vs. estimate $1.67, a 3.0% surprise) delivered a -3.04% next-day drop but still finished the next five trading days up 0.56%.

Options-Flow Dynamics Around the Next Earnings Date

The next scheduled report is 2026-08-18 after the close, with consensus EPS at $2.48. With the stock at $322.47339, the 50-day EMA at $326.21, and RSI at 49.8, the options market into that date is primarily repricing event risk rather than signaling a directional outcome.

Before an event, implied volatility usually rises as traders pay up for near-dated calls and puts, which in turn expands the price of at-the-money straddles. That implied move can be compared with the realized post-earnings drift: here the historical average five-day move is 10.71%, while the last four next-day moves ranged from -3.04% to 23.05%. If the straddle-implied move is priced materially wider than the actual move that follows, the long-volatility position can lose value quickly after the report even if the stock direction is correct. On the flip side, a straddle priced too cheap relative to the realized move can favor volatility buyers. Flow also tends to cluster around strikes near the current spot, so open-interest concentrations between $320 and $330 can act as magnets or barriers as dealers adjust delta and gamma hedges.

What a Disciplined Trader Watches For

A disciplined trader studies the first print against the $2.48 consensus, the after-hours gap, and whether the price can hold either the $326.21 50-day EMA or the $322.47339 spot. The wide dispersion in historical next-day reactions — from the 23.05% surge on 2026-02-23 to the -3.04% drop on 2025-08-19 — means the magnitude of the beat does not, by itself, determine the price response. In May 2026 the largest EPS surprise of the last four quarters produced the smallest five-day gain, 1.03%.

Post-earnings drift is a historical average, not a promise, so risk management matters: position sizing should reflect the 10.71% average five-day move and the single-event outliers at either extreme. Traders also watch for a volatility crush after the report, when the implied volatility component of option premium deflates and directional positions need a larger price move than expected to be profitable.

For a deeper look at how sell-side analysts, institutional flows, and valuation models are positioned ahead of the 2026-08-18 report, see the full institutional verdict.