Tech Stocks Rallied After the Fed Hike. The Bond Market Explains Why.

Warsh raised rates. The rally came later.

Kevin Warsh delivered a rate increase on Wednesday. By Thursday's close, investors had pushed the Nasdaq Composite up 1.7%.¹³

That looks contradictory until the sequence is put back together. On September 16, the Federal Reserve↗ raised its target range from 3.50%-3.75% to 3.75%-4.00%. The Nasdaq ended that session almost unchanged, down 0.01%, while the S&P 500 fell 0.45%. Thursday was the rebound.¹²

The distinction matters. Stocks were responding to a new combination of information: a hike investors anticipated, easing pressure from oil and bonds, and company developments that did not wait for the Fed. A higher policy rate was one input into that calculation.

An expected hike needs less repricing

The quarter-point increase was widely expected before it arrived. Investors could reduce exposure, demand lower valuations or adjust their forecasts in advance. An expected cost increase does not require a second, equally large repricing when the announcement confirms it.⁴

That does not mean the whole policy outlook was reassuring. The Fed's September projections↗ put the median year-end policy rate at 4.1%, with the same level projected for the end of 2027. June's corresponding forecasts were 3.8% and 3.6%. The projections became tighter, not friendlier.⁵

The market can therefore digest a hawkish Fed and still rise the following day if other conditions improve. Calling the rebound a bet on imminent rate cuts misses what the Fed actually published.

The rate that eased was outside the Fed's meeting room

On Thursday, the 10-year Treasury yield fell to 4.93% from 5.01% late Wednesday. Brent crude settled at $104.82 a barrel, down 1%.⁶

The Fed targets an overnight lending rate. Investors valuing years of future corporate cash flows also watch longer-term yields, which reflect the expected path of short-term rates and compensation for holding longer-duration bonds. Those market rates can move differently from the policy rate.⁷¹⁵

Lower Treasury yields can support stock valuations by reducing the return investors demand relative to safer bonds. Growth stocks can be particularly sensitive when much of their expected value lies years ahead. Thursday's move provided relief through that channel, even though the Fed had just tightened. The benefit can disappear if earnings expectations weaken or investors demand more compensation for owning risky shares.

Oil supplied another part of the explanation. Energy Secretary Chris Wright said Saudi Arabia's disrupted East-West pipeline would be restored soon, easing a supply concern. Cheaper oil can reduce inflation pressure and preserve customers' spending power, although a one-day decline cannot establish a lasting improvement.⁹

Some investors also interpreted the hike as evidence that the Fed would defend price stability. That is a plausible confidence effect, not proof that the hike itself caused the rally.⁸

AI companies are changing their own prices

Interest rates affect what investors will pay for a dollar of future cash flow. Company performance determines how many dollars might arrive. Both sides of that calculation can change at once.

On September 17, Nebius said it would raise on-demand rental prices for selected Nvidia GPUs by 17%-21%↗ from October 1. Customers making longer commitments can receive discounts, so the announcement is not a comparable increase across all contracted revenue.¹⁰

Higher rental prices can improve expected cash generation if customers accept them and capacity stays busy. That creates a company-specific reason for optimism alongside the macroeconomic rebound. The price increase and the Fed hike apply to different financial bases; comparing their percentages directly would be misleading.

Broadcom illustrates another distinction. It reported approximately $13.7 billion of quarterly free cash flow on September 2. That is company-wide cash generation after capital expenditure, not a projection of future AI profits. Businesses already generating substantial cash have more ways to fund investment than businesses dependent on continual borrowing.¹¹¹⁴

Neither example proves the entire AI buildout will earn adequate returns. They explain why investors can distinguish growing cash flows from rising financing costs rather than applying one verdict to every technology company.

A green index does not repair a balance sheet

Thursday's advance extended beyond technology, including gains in homebuilders and precious-metals miners. But CoreWeave declined after announcing new financing. A broad rebound can coexist with investors marking down a company facing its own funding demands.¹²

The stronger bearish argument is about time. A company can sell more computing capacity while spending even faster on equipment, power and construction. Fixed-rate borrowing may shelter existing projects, but new debt, refinancing and fresh equity still carry costs. Strong demand does not determine how much value remains for shareholders.

Nor does a Treasury yield just below 5% restore the economics of cheap money. Expensive shares remain exposed if expected profits disappoint, or if inflation forces another upward repricing of borrowing costs.

Warsh acknowledged that the Fed cannot directly control individual prices such as oil. Its objective is to stop those increases spreading through the economy. A renewed energy shock could therefore hurt stocks through both weaker spending and tighter policy.¹³

Watch whether the relief survives the next bill

The next test is whether lower oil and bond yields persist while companies turn demand into cash after capital spending. For cloud providers, watch realized rental prices, utilization and financing needs. For chip suppliers, watch whether customers keep ordering and paying.

Warsh has delivered the hike. The next earnings reports will show which companies can keep growing without asking shareholders to finance the difference.