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ETF comparison

IDU vs XLK

Utilities vs Technology.

iShares U.S. Utilities ETF · State Street Technology Select Sector SPDR ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

0 positions appear in both funds. Buying equal dollars of IDU and XLK would leave roughly 0.0% of each dollar exposed to the same underlying securities.

IDU unmatched 99.8% Shared 0.0% XLK unmatched 99.9%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In IDU only
45 positions
Shared
0 positions
In XLK only
74 positions

Side by side

IDU

iShares U.S. Utilities ETF

iShares · Utilities

63 composite / 100
Expense ratio
0.37%
Net assets
$1.36B
TTM yield
2.36%
Top-10 conc.
52.0%
XLK

State Street Technology Select Sector SPDR ETF

State Street · Technology

82 composite / 100
Expense ratio
0.080%
Net assets
$127.30B
TTM yield
0.46%
Top-10 conc.
64.5%

Sub-score comparison

63
Cost
92
81
Tax efficiency
85
62
Liquidity
100
40
Concentration
22
—
Tracking quality
—
IDU sub-score XLK

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

XLK is 29 bps cheaper than IDU. On a $100,000 position that's about $290/yr more in fees for IDU.

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with IDU vs XLK.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in IDU

45 total
  • NEXTERA ENERGY, INC. 11.20%
  • THE SOUTHERN COMPANY 6.59%
  • DUKE ENERGY CORPORATION 6.03%
  • WASTE MANAGEMENT, INC. 5.21%
  • CONSTELLATION ENERGY CORPORATION. 5.20%
  • AMERICAN ELECTRIC POWER COMPANY, INC. 4.30%
  • Dominion Energy, Inc. 3.76%
  • SEMPRA 3.57%
  • VISTRA CORP. 3.08%
  • ENTERGY CORPORATION 3.04%

Only in XLK

74 total
  • NVIDIA Corp 14.65%
  • Apple Inc 12.85%
  • Microsoft Corp 8.38%
  • Micron Technology Inc 5.42%
  • Broadcom Inc 5.41%
  • Advanced Micro Devices Inc 5.28%
  • Intel Corp 3.68%
  • Applied Materials Inc 3.20%
  • Lam Research Corp 3.02%
  • Cisco Systems Inc 2.58%

Related comparisons

More comparisons with IDU

More comparisons with XLK

Percentages are holdings overlap with the named fund.

Open IDU or XLK at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.