President Donald Trump just escalated his war on credit card interest rates, calling them illegal and demanding banks slash them to 10% or face consequences. But veteran strategist Ed Yardeni isn't buying it. He's treating the whole thing like what it probably is: a political test run that won't survive contact with reality.

Why This 'Trial Balloon' Won't Leave the Ground

Speaking on CNBC Monday, Yardeni addressed the sell-off in major bank stocks like JPMorgan Chase & Co. (JPM) and Capital One Financial Corp. (COF). The decline came after Trump issued what he called a severe ultimatum: cut credit card rates to 10% by the Jan. 20 inaugural anniversary or face legal action for violating the law.

Yardeni's take? This is just another administration trial balloon sent up to gauge public reaction. The problem with actually implementing it is that capping interest rates would require Congress to pass legislation, not just presidential decree. And given the strength of banking lobbyists on Capitol Hill, he predicts it's dead on arrival.

"Like this administration puts out a lot of trial balloons and sees which ones make it up into the stratosphere, and I don't think this one is gonna fly," Yardeni stated.

For investors looking to track the banking sector through this turbulence, here's how some key banking ETFs have performed:

Staying Bullish on a Rocky Road

Yardeni isn't downplaying the messiness of the situation. Political interference with the Federal Reserve and threats aimed at the banking sector definitely create what he calls a "rocky path" for investors. But he's sticking with his optimistic call: an S&P 500 target of 7,700 by year-end, which represents roughly 10% upside from current levels.

His reasoning centers on earnings, not politics. He views this market as "earnings-led," powered by an economy that has proven surprisingly resilient through multiple shocks since 2020. Another quarter of record corporate profits, he argues, will matter more than political theater and geopolitical uncertainties.

The Bond Market Isn't Asking for Help

Moving beyond the credit card drama, Yardeni also warned against further Federal Reserve rate cuts. The bond market isn't signaling distress that would justify more easing, especially given the economy's strength.

He pointed out that "bond vigilantes" have already pushed yields higher despite previous Fed rate cuts. If political pressure forces Chair Jerome Powell to lower rates when the economy doesn't need it, Yardeni cautioned it could trigger an unsustainable stock market "melt-up."

Market Performance Holds Up in 2026

Despite the political noise and banking sector jitters, major indices remain positive this year. The S&P 500 and Dow Jones indices have gained 1.44% and 3.09%, respectively, on a year-to-date basis. The Nasdaq 100 index has risen 1.03% in the same period.

The SPDR S&P 500 ETF Trust (SPY) and Invesco QQQ Trust ETF (QQQ), which track the S&P 500 index and Nasdaq 100 index, respectively, both closed higher on Monday. SPY was up 0.16% at $695.16, while QQQ advanced 0.083% to $627.17.

The futures of the S&P 500, Nasdaq 100, and Dow Jones indices were trading lower on Tuesday.