The fourth quarter is traditionally a good one for stocks, and an even better one for the technology sector.
Since 1990, the S&P 500 has climbed an average of 4.9 percent in the fourth quarter, according to Sam Stovall, U.S. equity strategist at S&P Capital IQ.
Among the 10 sectors within the broad gauge, however, technology tends to be the winner, with an average gain of 6.6 percent. The sector rose nearly 80 percent of the time.
So, what traditionally happens in Q4 when tech is down in Q3? After all, the sector declined 4.1 percent in this year's third quarter, its worst performance since the fourth quarter of 2012.