Technology stocks have delivered market-beating performance for a decade, but the end is near for their extended period of dominance, according to analysis by RBC Capital Markets, as cited by Barron's. Lori Calvasina, head U.S. equity strategist at RBC, has been bearish on the technology sector since April, and recently reiterated her underweight rating for it, unmoved by the market's strong positive response to an upbeat earnings release from FAANG and FAAMG member Apple Inc. (AAPL). The six red flags that she raises about tech stocks are listed below.

Tech Juggernaut

Index 10-Year Gain 1-Year Gain
Nasdaq 100 Index (NDX) 288% 26%
S&P 500 Information Technology Index 257% 30%
S&P 500 Index (SPX) 120% 15%

Sources: S&P Dow Jones Indices, Yahoo Finance

'Pervasive Overvaluation'

Bolstering Calvasina's case is the fact that tech stocks are a major driver of rampant overvaluation in the U.S. stock market as a whole, given that the tech sector represents 26% of the value of the S&P 500, per Fidelity Investments, and 56% of the Nasdaq 100, per Doug Ramsey, chief investment officer (CIO) at The Leuthold Group, sees disturbing parallels between the overvalued dotcom bubble market of 2000 and today's market, MarketWatch reports. Worse yet, he writes, as quoted by MarketWatch, "Overvaluation in 2000 was highly concentrated, today it is pervasive." He adds, "the wonderment surrounding the disruptive technology of today's market leaders seems to have swelled to maybe 1998-ish levels." (For more, see also: 3 Tech Stocks Nearing a Breakout.)

Tech Stocks: 6 Red Flags

Deteriorating Positive Sentiment on Tech Stocks
Valuations at Post-Bubble Peaks
Declining Tech ETF Inflows
Decelerating Earnings Growth
Rising Dollar Reduces Tech Exports and Dollar Value of Overseas Earnings
High Risk of Profit Taking in Tech Stocks

Source: Barron's

Each red flag is discussed in more detail below.

Deteriorating Sentiment

Calvasina notes that buy ratings on tech stocks from sell-side analysts are at post-bubble highs, and starting to decline in number. Moreover, she indicates that institutional investors are looking to trim their holdings of big tech stocks, most notably the FAANG group, which includes Facebook Inc. (FB), Inc. (AMZN), Apple, Netflix Inc. (NFLX) and Google parent Alphabet Inc. (GOOGL). While she is among those who believe that investments in tech stocks are extremely crowded, Goldman Sachs disagrees, and they have issued a positive outlook for the sector. (For more, see also: Tech Stocks Will Get Big Boost From Buybacks: Goldman.)

High Valuations

In terms of both price-earnings (P/E) ratios and enterprise value to EBITDA (EV/EBITDA) ratios, Calvasina finds that tech sector valuations are at post-bubble peaks. Additionally, she calculated that, as of the Monday July 30 close and before Apple reported earnings, the tech sector P/E was 1.18 standard deviations above its historical average.

Declining ETF Inflows

A major source of demand for tech company shares, buoying their prices, has been buying by ETFs, including tech-oriented ETFs. She indicates that net purchases by ETFs appear to have peaked in the first quarter, and have headed downward since then.

Decelerating Earnings Growth

Reported earnings per share (EPS) by tech companies had been beating analysts' estimates consistently, driving frequent upward revisions to these forecasts. Now she sees the pace of both "starting to decelerate for the sector off peak levels," as quoted by Barron's.

The Rising Dollar

Given that the U.S. tech sector has high international exposure, both through exports and the earnings of overseas divisions, Calvasina observes that a continued increase in the valuation of the U.S. will provide a headwind for revenues and earnings. A rising dollar increases the cost of exports in terms of local currencies, while it also reduces the U.S. dollar value of sales and earnings generated abroad.

Profit Taking

After enjoying strong gains from their holdings of tech stocks, actively-managed growth funds may be tempted to lock in some of those profits. This is especially likely among funds that are overweight in technology. If such selling becomes widespread, it inevitably will exert on tech stock prices.