Nasdaq Leads a 1.73% Lift as Crude and Yields Retreat

U.S. stocks posted their best session in six weeks on Thursday, Sept. 17, 2026, as falling oil prices and easing bond-market pressure sent the Nasdaq 100 proxy QQQ up 1.73% to $716.92 and the S&P 500 tracker SPY up 1.13% to $762.60 at the close.

Two of the pressures that have been squeezing equity valuations for weeks let up at the same time on Thursday, and the stock market took the gift. Oil prices fell and the bond market stopped leaning on share prices, producing what BNN Bloomberg described as Wall Street's best day in six weeks.

The scale of the move was uneven across the three main benchmarks, and the pattern of that unevenness is the most useful thing in the session. The SPDR S&P 500 ETF Trust (NYSEARCA: SPY) closed at $762.60, up 1.13% from the prior close of $754.05, with a day range of $759.96 to $763.57. The Invesco QQQ Trust (NASDAQ: QQQ), which tracks the Nasdaq 100, closed at $716.92, up 1.73% from $704.72, ranging between $713.32 and $718.04. The SPDR Dow Jones Industrial Average ETF Trust (NYSEARCA: DIA) closed at $518.35, up 0.61% from $515.22, with a range of $516.55 to $520.67. All figures are as of the last trade at 20:00 GMT on Sept. 17, 2026; the market is now closed.

The growth end of the market did the heavy lifting

The Nasdaq 100 proxy gained roughly half again as much as the broad S&P 500 tracker and close to three times the Dow vehicle. That ordering is what you would expect when the driver is lower long-term interest rates rather than better news about the real economy.

Long-duration equities "�- companies whose value sits mostly in profits expected years out "�- are the most sensitive to the rate used to discount those profits. When Treasury yields back off, that discount rate falls and the present value of distant cash flows rises fastest. The Dow, with its heavier weighting toward industrials, financials and consumer staples, has less of that duration risk and therefore less to gain from a bond rally.

The narrow intraday ranges reinforce the read. Each of the three funds spent the day in a tight band and finished near the top of it rather than whipsawing. That is the signature of a steady, one-directional repricing off a macro input, not a scramble driven by a single earnings report or headline shock.

Why cheaper crude works through to equity multiples

Falling oil prices hit stocks through more than one channel, and on a day like Thursday the channels point the same way.

• Input costs. Energy is a cost line for airlines, trucking, chemicals, packaging and almost anything that has to be moved. Lower crude relieves margin pressure directly.
• Consumer cash flow. Fuel is a non-discretionary purchase. Money not spent at the pump is money available for everything else, which supports the consumer-facing parts of the index.
• Inflation expectations. Crude feeds into headline inflation quickly. Softer oil dampens the inflation path investors price in, which in turn loosens the case for higher policy rates and lower bond prices.

That last channel is why the oil move and the bond move are not two separate stories. They are closely linked: a falling energy complex makes it easier for the Treasury market to calm down, and a calmer Treasury market is what lets equity multiples expand. Thursday delivered the sequence in a single session.

Energy shares are the obvious offset

The flip side is that cheaper crude is not good news everywhere. Producers, drillers, oilfield services and integrated majors see falling prices as falling revenue per barrel. A session that lifts the index on lower oil is, almost by definition, a session in which the energy sector is contributing little or subtracting.

That matters for Canadian investors in particular. The Toronto market's weighting toward energy and materials means a crude-led U.S. rally does not transmit north with the same force. A U.S. tape driven by duration-sensitive technology is the least favourable configuration for an index built around resources and banks. Canadian portfolios that are underweight U.S. technology tend to capture less of exactly this kind of day.

Reading a good day without overreading it

A best-in-six-weeks session is a statement about what had come before as much as about Thursday. The fact that a 1.13% gain in the broad market qualifies as the strongest showing in six weeks tells you the preceding stretch was grinding and directionless. Oil and bond yields had been the twin constraints; one good day of relief is not evidence that either has been resolved.

Nothing in the session's drivers touches corporate fundamentals. Nobody reported better earnings because crude fell. The rally is a repricing of the same expected cash flows at a friendlier discount rate, and repricings can be handed back as fast as they arrive if the inputs reverse.

What determines whether this holds

Three things are worth tracking from here.

• Whether the oil decline extends or snaps back. Energy prices have been the volatile input. A single down day does not establish a trend, and a reversal would put the inflation channel back to work against equities.
• Whether long yields stay down. The equity multiple is doing the work in this rally. If the bond market resumes pressing, the Nasdaq-led leadership is the first thing to unwind, because the most duration-heavy names cut both ways.
• Whether the Dow starts catching up. A rally that broadens into industrials, financials and staples suggests investors are pricing growth, not just cheaper money. Continued narrow leadership suggests the opposite.

For now the ranking is clear enough: QQQ at $716.92, SPY at $762.60, DIA at $518.35, each at its most recent close, with the gap between them telling you the session was about rates and energy rather than about the economy.

Key facts

• S&P 500 tracker (SPY): $762.60, +1.13% at the Sept. 17, 2026 close (20:00 GMT)
• Nasdaq 100 tracker (QQQ): $716.92, +1.73% at the Sept. 17, 2026 close
• Dow 30 tracker (DIA): $518.35, +0.61% at the Sept. 17, 2026 close
• Session drivers: Falling oil prices and easing bond-market pressure; best U.S. equity day in six weeks

Frequently asked questions

How much did U.S. stocks gain on Sept. 17, 2026?

At the last trade at 20:00 GMT, the S&P 500 tracker SPY closed at $762.60, up 1.13% from its prior close of $754.05. The Nasdaq 100 tracker QQQ closed at $716.92, up 1.73% from $704.72. The Dow tracker DIA closed at $518.35, up 0.61% from $515.22. It was the market's best day in six weeks.

Why did falling oil prices push stocks higher?

Cheaper crude lowers input costs for transport, chemicals and packaging companies, frees up consumer spending that would otherwise go to fuel, and dampens headline inflation. That last effect reduces the pressure on bond yields, which in turn lifts the valuation investors are willing to pay for future corporate profits.

Why did the Nasdaq 100 outperform the Dow?

Nasdaq 100 companies derive more of their value from profits expected far in the future, making them highly sensitive to the interest rate used to discount those profits. When long-term yields ease, those distant cash flows are worth more. The Dow's heavier industrial, financial and staples weighting carries less of that duration sensitivity.

Does a falling oil price hurt any part of the stock market?

Yes. Oil producers, drillers, oilfield services firms and integrated majors earn less revenue per barrel when crude falls. A session that lifts the broad index on cheaper oil typically sees the energy sector contribute little or detract, which offsets part of the gain elsewhere.

What does this session mean for Canadian investors?

The Toronto market is weighted toward energy and materials, so a U.S. rally driven by falling crude and duration-sensitive technology does not transmit north with the same force. Canadian portfolios underweight U.S. technology tend to capture less of a day led by growth stocks reacting to lower yields.

Is this rally a sign the market's problems are over?

Not on the evidence of one session. The move reflects a repricing of the same expected earnings at a friendlier discount rate, not improved corporate fundamentals. The fact that a 1.13% broad-market gain was the best in six weeks indicates the preceding stretch was weak, and both oil and yields can reverse.

Sources

• U.S. stocks rally to their best day in 6 weeks after oil prices and bond yields ease — BNN Bloomberg

Photo: David Adam Kess · BY-SA 4.0 — source