The S&P 500 has only manage to gain 1.67% for investors year to date in the first half of this year. We are in an aging bull market, returns for the 2017 fiscal year were much higher coming in at 21.83%. A major selloff in February, simmering U.S.- China trade war tensions have had some investors on the edge, but the benchmark index has managed to stay in the green.

It has been a mixed showing among companies that carry the maximum weight in the index. Technology companies led the way as the biggest gainers with Inc (AMZN), Microsoft Corp. (MSFT), and Apple In. (AAPL) on top. Their stock prises rose by 45.35%, 15.28%, and 9.38% respectively. On the other hand, Johnson & Johnson (JNJ), Berkshire Hathaway (BRK.B), and JP Morgan Chase (JPM) are among the top index heavy weight losers.  (See also: 3 Stocks Poised to Lead as S&P 500 Breaks Out)

Performance Of Top 10 Weighted Stocks in the S&P 500

Company Name Ticker Percent Gain/Loss
Apple Inc. AAPL 9.38%
Microsoft Corp. MSFT 15.28% Inc. AMZN 45.35%
Facebook Inc. FB 10.12%
Berkshire Hathaway BRK.B -5.84%
JP Morgan Chase & Co JPM -2.56%
Exxon Mobil Corp. XOM -1.09%
Alphabet Inc C GOOG 6.62%
Alphabet Inc A GOOGL 7.19%
Johnson & Johnson JNJ -13.15%

Top Performing Stocks in the S&P 500

In the first six months of the year, Netflix Inc (NFLX) share price has more than doubled, gaining 103.91% making it the highest performing stock on the S&P 500. Twitter (TWTR) with its stock soaring 81.88% in the period comes next on the list..

Here are some stocks that provided bumper returns in H1 2018.

Company Name Ticker Percent Gain
NFLX NFLX 103.91%
Twitter TWTR 81.88%
TripAdvisor Inc. TRIP 61.67%
XL Group Ltd XL 59.13%
Under Armour Inc.- Class C UA 58.26%
Under Armour Inc.- Class A UAA 55.79%
Align Technology ALGN 53.99%
Chipotle Mexican Grill CMG 49.25%
Macy's Inc M 48.59%
Advanced Micro Devices AMD 45.82%

All figures are sourced from FactSet.