The Year So Far

It's been a pretty middling year in the markets: Halfway into 2018, the S&P 500 is up less than 2 percent. Moreover,  all of those gains are thanks to a rally in just two sectors: technology and consumer discretionary.

The S&P 500 information technology sector, in fact, accounted for 102 percent of the year-to-date gains as of Friday. Amazon.com, which is in the consumer discretionary sector, has accounted for 34.6 percent of all the gains. Amazon.com has gained more than 45 percent since the start of the year.

Considering market caps, the five largest contributors to the year-to-date gains have been:

• Amazon.com, up 0.82 percent   
• Microsoft, up 1.42 percent 
• Apple, up 1.12 percent 
• Netflix, up 1.72 percent 
• Facebook, up 1.56 percent