NEW YORK (ETF Expert) -- What exactly makes an exchange-traded fund in a given economic segment "cheap?" I am beginning to think that the concept is as arbitrary and as disobliging as the automatic spending cuts in Washington D.C.

For example, Russ Koesterich is the chief investment strategist for

BlackRock

(BLK) - Get Report

. I genuinely enjoy reading his perspectives on "everything iShares." Indeed, every exchange-traded fund enthusiast should follow Russ on

Twitter

or sign up for BlackRock's weekly update.

That said, in a blog post Thursday, Russ declared that the energy and technology sectors look like bargains. The implication? One should consider investing in the

iShares DJ Energy Sector Fund

(IYE) - Get Report

and/or the

iShares DJ Technology Sector Fund

(IYW) - Get Report

.

Year-to-date, both IYE and IYW have underperformed non-cyclical segments like health care and consumer staples. Is this a contributing factor for declaring that IYE and IYW are inexpensive?

Perhaps the notion that energy and tech may be cheap has more to do with P/E ratios.

At iShares.com

, the trailing price-to-earnings ratio for IYE and IYW are 16.24 and 19.48. These numbers are not lower than their corresponding five-year averages. However, they are closer to their historical averages than non-cyclicals like staples and health care.

Of course, there are other forms of valuation, from price-to-sales to forward earnings projections to proprietary fair value estimates. Incidentally, independent researchers at Morningstar believe the energy and tech sectors to be "fairly valued."

Nevertheless, investors in either IYE or IYW must look under the hood. The former has a 24% allocation to

Exxon Mobil

(XOM) - Get Report

alone, while the latter has a 16% stake in

TST Recommends

Apple

(AAPL) - Get Report

.

Even if you believe that these sectors offer compelling, bargain-basement value, you might prefer equal weighted trackers like

Guggenheim S&P 500 Equal Weight Energy

(RYE) - Get Report

or

Guggenheim S&P 500 Equal Weight Technology

(RYT) - Get Report

.

Granted, artificially low interest rates allow households and corporations to improve their balance sheets. Yet, the markets themselves may find it difficult to embrace below-trend economic growth in the U.S. and Europe.

Doubts about economies that cannot sustain themselves often find their way into the price movement of cyclical sectors like energy and tech. In essence, you might wait for these "bargains" to become much bigger bargains.

Follow @ETFexpert

This article was written by an independent contributor, separate from TheStreet's regular news coverage.

Disclosure Statement: ETF Expert is a website that makes the world of ETFs easier to understand. Gary Gordon, Pacific Park Financial and/or its clients may hold positions in ETFs, mutual funds and investment assets mentioned. The commentary does not constitute individualized investment advice. The opinions offered are not personalized recommendations to buy, sell or hold securities. At times, issuers of exchange-traded products compensate Pacific Park Financial or its subsidiaries for advertising at the ETF Expert website. ETF Expert content is created independently of any advertising relationships. You may review additional ETF Expert at the site.

Gary Gordon reads:

Real Clear Markets

Jeff Miller

indexuniverse

Charles Kirk

On Twitter, Gary Gordon follows:

Jonathan Hoenig

Doug Kass

Hard Assets Investor