The technology sector rallied more than 27% in 2017, outperforming the broader market. And with President Donald Trump's tax plan set to benefit big corporations (think repatriation of overseas cash, decreased corporate taxes), the tech sector stands to benefit greatly throughout 2018. (See also: Top 5 Technology Penny Stocks to Watch for 2017.)

Although there is always inherent volatility in technology, the sector has consistently performed well – the Nasdaq is up 113% over the past five years compared with a 65% gain for the S&P 500. If you're looking for exposure to technology to diversify your portfolio, here are our top technology mutual fund picks for 2018. (See also: Top 4 ETFs to Track the Nasdaq.)

Note: funds were selected on the basis of year-to-date (YTD) performance, assets under management and overall ratings. All figures were current as of June 18, 2018.

1. Fidelity Select IT Services Portfolio (FBSOX)

  • Issuer: Fidelity
  • Assets Under Management: $2.46 billion
  • Expense Ratio: 0.77%
  • 2018 YTD Performance: 11.56%

FBSOX is one of the largest and oldest of the technology mutual funds. Over the life of the fund (inception date February 1998), it has delivered average annualized returns exceeding 12%. The fund's objective is capital appreciation, and it invests at least 80% of its assets in companies providing IT services. The mutual fund is relatively concentrated – although there are 50 equities in the fund's portfolio, the top 10 holdings account for 67% of the assets. About 95% of the equities are domestic, with the remainder in international emerging markets.

The turnover rate is low at just 27%. FBSOX requires a $2,500 minimum investment and $25 minimum recurring investments. (See also: 3 Mutual Funds That Invest in U.S. Companies With Indian CEOs.) The fund has delivered one-, three- and five-year annualized returns at 44.03%, 21.57% and 21.03%, respectively.

2. Red Oak Technology Select Fund (ROGSX)

  • Issuer: Oak Associates Funds
  • Assets Under Management: $537.15 million
  • Expense Ratio: 0.97%
  • YTD Performance: 9.85%

ROGSX is a long-term growth fund that bases stock picks on fundamentals without regard to market cap. There are just 34 holdings in the fund's portfolio, with the top 10 equities accounting for just 45%  of its assets. You'll see household names like Alphabet (GOOG) and Intel (INTC​), as well as somewhat lesser known equities like VMware, Inc. (VMW) powering the fund's solid returns.

Since its inception in 1998, the fund has delivered returns of nearly 5%, with one-, three- and five-year annualized returns at 24.12%, 20.92% and 20%, respectively.

3. T. Rowe Price Global Technology Fund (PRGTX)

  • Issuer: T. Rowe Price
  • Assets Under Management: $6.75 billion
  • Expense Ratio: 0.89%
  • YTD Performance: 9.39%

This is an aggressive growth fund for investors seeking long-term capital growth. Turnover is brisk at 101%, as you'd expect from an aggressively managed fund. Since its inception in 2000, the fund has consistently outperformed the MCSI All Country World Index IT and the Lipper average for global technology funds.

One-, three- and five- average annual returns are 23.84%, 23.20% and 26.92%, respectively. There is a $2,000 minimum investment required ($1,000 for an IRA) and a charge of $100 to add to an account. (See also: Top Mutual Funds for Aggressive Investors.)

4. Columbia Seligman Global Technology Fund (SHGTX)

  • Issuer: Columbia Threadneedle Investments
  • Assets Under Management: $1.26 billion
  • Expense Ratio: 1.33%
  • YTD Performance: 8.45%

SHGTX is another aggressive growth fund, and compared with the MCSI World Index IT Index Net, its portfolio is heavily concentrated in semiconductors (48.5% vs. 15%) and short on IT (6% vs. 17%). However, SHGTX has consistently outperformed the index by between 5% and 10% over the past three years. (See also: Semiconductor Names Tied at the Hip to Apple.)

One-, three- and five-year annualized returns are 17.29%, 17.85% and 21.81% respectively. The fund requires a $2,000 minimum investment.

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