Second place in a duopoly is a genuinely difficult business

It traded at 607.67 this morning, -1.27% on the session. The bull case is that share is moving and the addressable market is enormous. Both are true and neither settles the question.

Why customers want a second source

Every large buyer of a critical component wants an alternative, for reasons that have nothing to do with the alternative being better. A second supplier is leverage in a negotiation and insurance against allocation.

So the second player gets invited in, gets designed in, and gets share. What it often does not get is price, because the whole reason it was invited was to apply pressure to the first.

The question that decides it

Is share being won on capability or on price. Those produce identical revenue growth and completely different businesses.

• Gross margin trajectory as share rises, which is the honest test
• Whether design wins are in high-value sockets or the volume tail
• Customer concentration, since a few very large buyers set terms
• Software and ecosystem investment, which is where the first player's real moat sits

That last one is the part I keep coming back to. Hardware gaps close. Toolchains and the accumulated body of code written against them close far more slowly, and that is a cost the second player carries without a matching revenue line.

Why I am flat

Share gains at falling margin are a market share story and a shareholder problem.

I have no doubt about the engineering. My hesitation is that the structural position rewards the customer more than the supplier, and that shows up in margin rather than revenue.

What would move me

Gross margin expanding while share rises. That combination would tell me the wins are on capability, and it would change the business I think I am looking at.