Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of electronic manufacturing operator Plexus (Nasdaq: PLXS) look good today, rising as much as 16% on very heavy trading volume.

So what: The Wisconsin-based builder of mainly industrial and medical equipment posted a terrific second-quarter report last night, as sales and earnings rose in lockstep by 15.7% year over year. Shares have now gained more than 36% over the last three months.

Now what: An astute investor might have predicted a quarter like this from Plexus when sector rival Jabil Circuit (NYSE: JBL) knocked the cover off the ball last month. Then again, Benchmark Electronics and Sanmina-SCI (Nasdaq: SANM) both flubbed this quarter. This tide is leaving some boats behind, so Plexus and Jabil come out looking like men among boys.

Interested in more info on Plexus? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool is investors writing for investors.