Government bond yields climbing and a shrinking gap between short-term and long-term Treasury rates have prompted some consternation on Wall Street, driving equity prices lower as investors fret about what these dynamics mean for U.S. economic growth as it enters its ninth year of expansion.

Fears about a so-called flattening yield curve have taken center stage, with investors fixated on the gap between the 2-year Treasury notes TMUBMUSD02Y, 0.136% and the 10-year benchmark TMUBMUSD10Y, 0.674% , which last Tuesday touched the narrowest point—41 percentage points—in more than a decade.

The yield curve is often tracked as a measure of sentiment about the economy’s overall health. In a normal environment, the shape of the curve steepens because investors tend to demand a higher yield for lending further into the future, while a flattening curve is read as a sign that investors are worried about the longer-term outlook. An inverted curve, where shorter-dated yields exceed those for longer-dated debt, a dynamic known as inversion, rings alarms because it has faithfully preceded all recessions since 1960.

Read:Why stock-market investors should embrace a flattening yield curve—for now

The threat of such an inversion has even caught the attention of Federal Reserve officials, with St. Louis Fed President James Bullard saying that If the central bank goes ahead and raises rates and the 10-year rate “does not cooperate,” the yield curve could invert later this year or in 2019. Bullard added that the yield-curve signal should be taken seriously. Bullard isn’t presently a voting member of the policy-setting Federal Open Market Committee.

Read: This chart warns that the 30-year downtrend in interest rates may be over

Not everyone is freaking out about that possibility, however.

In a Friday research note, Raymond James analyst Andrew Adams argues that not every narrowing yield spread between the 2s and 10s results in an inversion, and that some of the best stock-market performance has come amid such flattening yield trends:

It is true that all recessions since 1960 have been preceded by an inverted yield curve (commonly defined these days as when the 2-Year U.S. Treasury yields more than the 10-Year U.S. Treasury), but the problem is that too many people have recently been expanding this relationship to a flattening yield curve as well. Yes, the yield curve has been flattening—the spread between the 10-Year and 2-Year has narrowed from ~130 basis points at the beginning of 2017 to 48 basis points now—but crossing the inversion point is far from imminent. A yield curve as flat as it is now does not always lead to an inverted yield curve and even if it does, the lag time can be years before it occurs. What’s more, some of the best stock market returns in history have come after the yield curve became flatter than it is now, including after 1984, 1988, 1994, and 2005 (see chart 2 on page 2; arrows in lower S&P 500 panel represent when the 10-2 spread first became as narrow as it is currently). In fact, the 10-2 spread was relatively flat for the entirety of the 1994-2000 period, the greatest stock market run in history. So, are we worried about the yield curve signaling a possible recession is on the way? No, not at this stage.

Here’s a chart provided by the Raymond James analyst by way of Stockcharts.com:

The fear of rising bond yields

The steady climb of the 10-year Treasury yield to its highest level since 2014 on Friday has unsettled the markets (extending that ascent early Monday), sending ripples through the U.S. dollar and stocks, even as the yield curve steepened somewhat.

On Friday, selling pressure in U.S. equity benchmarks intensified late in the day as the yield on the 10-year Treasury note hit a more-than-four-year high, with yields touching near 3% in early Monday action.

To close out the week, the Dow Jones Industrial Average DJIA, +0.51% fell 201.95 points, or 0.8%, to 24,462.94 but ended the week 0.4% higher. The S&P 500 SPX, +1.05% declined 22.99 points, or 0.9%, to 2,670.14 with 10 of the 11 main indexes ending with losses. Consumer-staples and technology sector were hit the most, falling 1.7% and 1.5%, respectively. The benchmark index still posted 0.4% gain over the week, however. The Nasdaq Composite Index COMP, +1.71% dropped 91.93 points to 7,146.13, a decline of 1.3%. Over the week, the tech-heavy index rose 0.5%.

Meanwhile, the dollar DXY, +0.07% has been strengthening as the 10-year flirted with the 3% mark, which can drive demand from buyers looking to invest in the buck with the promise of yields that exceed dividends for stocks.

Yields have been a pivot point for the markets since back in February when the 10-year made another break toward 3% on Friday and again Monday. The higher borrowing costs it implies for corporations and the competition that bonds would offer against equities is part of the reason that investors have paused when Treasury rates pitch higher.

Fixed-income gurus like DoubleLine Capital’s Jeffrey Gundlach and Scott Minerd, chief investment officer at Guggenheim Partners have pointed to 3% as a signal that a period of rising prices in government bonds that has persisted for the past three decades may be nearing an end, and spells bad news for stocks.

Higher rates can be stomached by the market if they suggest that the economy is genuinely improving, but can cause anxieties if there are questions about growth, market participants say.

Read: Dollar rebound not here to stay: analyst

Busiest week of corporate earnings ahead

Can corporate earnings calm investor nerves about yield curves and rising rates?

That is the big question. “I think investors want to see more. Next week, we’ll have a broader swath of earnings from all sectors, and we need to focus on the tech sector,” Quincy Krosby, chief market strategist at Prudential Financial, told CNBC during a Friday interview.

See also: Can Facebook, Apple and Google keep powering tech’s growth?

Lindsey Bell, investment strategist at CFRA, told MarketWatch that nearly 80% of the companies that have reported so far have beaten earning estimates, while about four out six companies have outperform on sales. “Much better than historical standards of 66% and 55%, respectively,” she wrote.

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Thus far, earnings growth is tracking at 17.5% year-over-year for the index, better than the 16.3% expected at the start of the earnings season.

However, that hasn’t spurred Wall Street buying:

“Despite the positive results, stocks have not reacted favorably. Companies that beat on both the top and bottom line have only seen their stocks rise 0.5% on the day of the report, on average. But companies that have missed EPS expectations and beat sales expectations have endured a 4.4% decline on average on the day they report results.

Looking ahead, next week 37% of the index will report results, making it the busiest week of this earnings season, Bell said. Specifically, 179 S&P 500 companies (including 12 Dow 30 components) are scheduled to report results for the first quarter, according to FactSet data.

Alphabet earnings: Google will offer a gander at its Uber investment

Companies reporting early include Google-parent Alphabet Inc. GOOG, +2.39% GOOGL, +2.07% on Monday after the closing bell, Dow components United Technologies Corp. US:UTX Coca-Cola Co. KO, +1.16% Caterpillar Inc. CAT, +1.25% 3M Co. MMM, +0.60% Verizon Communications Inc. VZ, +0.35% Travelers Cos. Inc. TRV, -0.18% on Tuesday before the start of regular trade.

Economic Data

Monday

Tuesday

Case-Shiller house price index for February due at 9 a.m.

New home sales at 10 a.m., with 625,000 new properties expected

Consumer confidence for April due at 10 a.m., with 126 forecast

Thursday (all reports at 8:30 a.m. unless otherwise denoted)

Durable goods orders for March

Advance trade in goods

Core-capital equipment orders

Weekly Jobless claims

First-quarter Housing vacancies 10 a.m.

Friday