The Dow's technology components all fell with Microsoft posting the biggest loss, down $1.66 at $59.
Blue-chip stocks declined, led by weakness in financial and technology components.
Intel, another of the Dow's technology components, dropped $2, to $23.63, while Microsoft lost 56 cents, to $56.19.
Unlike other Chinese firms, SAIC has not "borrowed" technology, components or designs for its new car.
It is also a major provider of defense and commercial electronics technology, components, and materials.
The Dow's technology components, like I.B.M., bolstered the index, which was weighed down by faltering financial stocks like J. P. Morgan Chase, which closed down $2.32, at $52.28.
And while the Dow sank 161.95 points yesterday after being up as much as 138.37 points, its technology components accounted for virtually all of it.
His father, also retired, was an independent salesman based in Hewlett, N.Y., who sold laser and color-sensor technology components.
The quantities of rare earths used in technology components are so tiny that higher prices are invisible in the cost to consumers.
"Technology components that support AVs have already been deployed and tested on our roads, so we did not have to wait to roll out the solutions all at once".
The Dow was helped by some technology components but rose also on the strength of its banking-related issues, which rallied on upbeat results from Merrill Lynch, which rose $4.88, to $80.
