Why Trade Desk's stock is the S&P 500's sharpest decliner on Monday

By Emily Bary

Following another CFO change, analysts are worried about a pattern of leadership turnover at the company, as well as the judgment of those who selected the previous CFO

Trade Desk makes advertising-technology offerings, including for the connected-TV market.

Credibility issues are mounting for Trade Desk, the advertising-technology company that just announced a new interim chief financial officer about five months after naming its last permanent one.

Tahnil Davis, Trade Desk's (TTD) current chief accounting officer, will hold the CFO post while the company looks for a permanent successor to Alex Kayyal, the company said on Monday.

"We view the news as a negative development," Evercore ISI analyst Mark Mahaney said in a note to clients. "At a minimum, it calls into some question the judgement of the management team and board that hired Kayyal, who actually had no direct CFO experience" prior to serving in that role at Trade Desk, he added.

In his view, the change doesn't seem to reflect a financial disagreement, seeing as Trade Desk reaffirmed its financial guidance for the fourth quarter.

But the fact that the company kept its guidance steady made Jefferies analyst James Heaney more confident in his view that the next earnings report "won't be enough to lift sentiment" for the beleaguered stock.

Trade Desk's stock has been beaten down lately. Its 68% decline last year was the worst performance of any S&P 500 SPX member, according to Dow Jones Market Data, although the company didn't actually join the index until July. The stock is off another 11% so far this year, factoring in the 7.5% decline in Monday's session, which ranks as the S&P 500's steepest on the day.

Shares of Trade Desk, whose ad-tech products serve the connected-television industry, among other areas, have never been so cheap, a MoffettNathanson analyst wrote earlier this month.

Heaney at Jefferies noted that Trade Desk has seen executive turnover in more than just its financial unit over the past few years. For instance, its new chief revenue officer, who started in November 2025, took over for someone who had been in the spot less than two years, he noted.

"These senior leadership shifts, combined with recent misexecution, intensifying competitive pressure from [Amazon], negative press around recent product rollouts and limited management transparency around the sources of weakness, explain today's sharply negative stock reaction," he wrote. "We come away with more questions than answers."

-Emily Bary

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