The Q4 2017 earnings reporting period starts up next week, and as we do prior to every earnings season, in this post we provide lists of the stocks that have historically been the most volatile on their earnings reaction days.

If you follow markets at all, you know that stocks see their biggest price moves in reaction to their quarterly earnings reports.  Since this is the case, to us at least, it’s very important to know how stocks typically react to their quarterly reports.  To keep track of these price moves, we maintain a huge database called our Earnings Screener that contains every quarterly earnings report for US stocks going back to 2001.  There are roughly 150,000 individual quarterly reports in the database at this point, and every quarter we add to the list — giving us an even more comprehensive data set to analyze.

Users of our Earnings Screener can search for historical reports on a stock by stock basis, or they can run searches to find, for example, a list of stocks that have beaten EPS estimates, beaten revenue estimates, and raised guidance over a specific time frame.  The capabilities of the database are pretty limitless, so give it a try by starting a 14-day free trial to Bespoke Institutional.  It’s only available at the Bespoke Institutional membership level.  You can see a video tutorial of how to use the database here.

From our Earnings Screener, we pulled every quarterly report since 2001 to find the average volatility of stocks on their earnings reaction days by sector.  (For stocks that report in the AM before the open, its earnings reaction day is that trading day.  For stocks that report in the evening after the close, its earnings reaction day is the next trading day.)

As shown, the average one-day price change in reaction to earnings for all stocks in our database has historically been +/-5.34%.  So investors can basically expect any given stock to move roughly 5% up or down when it reports earnings every quarter.

Some sectors see much more volatility on earnings than others, though, and you can probably imagine which sectors are most and least volatile.  As shown, Technology sector stocks are the most volatile on earnings, with an average one-day price change of +/-7.15%.  Consumer Discretionary, Health Care, and Industrials are the three additional sectors that see their stocks move more than the market average on their earnings reaction days.

On the flip side, Utilities and Real Estate (REITs) stocks are the least volatile in reaction to earnings.  The average REIT moves just +/-2.51% on its earnings reaction day each quarter, while the average Utilities stock moves even less at just +/-2.26%.

Below is our updated list of the individual stocks that see the biggest moves on their earnings reaction days.  If you’re looking for volatility during earnings season, this is the place to start.

To make the list, a stock must have at least 3 years (12 quarters) worth of earnings reports, and it must currently trade above $10/share.

As show, LendingTree (TREE) ranks as the most volatile stock on earnings with an average move of +/-15.22% on its earnings reaction day.  As a $358 stock, that means you can expect a move up or down of $53/share when it reports on 2/22 if it just experiences an average move.

Just behind TREE is YELP in second place with an average move of +/-15.22% on earnings.  Behind Yelp is AAOI, NES, and BOOT.  The top five most volatile stocks on earnings all move more than +/-14% when they report once per quarter.

While you may not be familiar with the five most volatile stocks on earnings, you surely know Netflix (NFLX) in sixth place.  As shown, Netflix — which reports after the close on 1/22 — has historically moved +/-13.49% on its earnings reaction days.  That’s roughly $27 per quarter at its current share price.

Other notables on the list include stocks like Twitter (TWTR), First Solar (FSLR), iRobot (IRBT), Nutrisystem (NTRI), Wayfair (W), Tableau Software (DATA), and Align Tech (ALGN).

Below we highlight the most volatile S&P 500 stocks on earnings.  In the table above, NFLX and ALGN were the only S&P 500 names to make the list.  In the S&P 500 specifically, along with NFLX and ALGN, the three stocks that round out the top five are Priceline (PCLN), Akamai Tech (AKAM), and TripAdvisor (TRIP).  Each of these stocks along with two more — KORS and ISRG — historically move more than +/-10% on their earnings reaction days. (AMZN) — one of five largest companies in the world — just barely misses the 10% mark with an average move of +/-9.42% on earnings.  Other notables on the list of big S&P 500 earnings movers include NVIDIA (NVDA), Ulta Beauty (ULTA), Chipotle (CMG), Under Armour (UA), (CRM), Best Buy (BBY), and Facebook (FB).

All of the stocks listed in the table above and the table below are worth keeping an eye on this earnings season.  While it’s impossible to know whether they’ll trade up or down (although many have historically averaged big gains), you can rest assured that they’ll experience big moves.

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