Intel shares exploded 25% on Friday after The Wall Street Journal reported that Apple has reached a preliminary agreement for Intel to manufacture chips for iPhones and other devices.

If you're wondering why this is a bigger deal than just another supplier contract, here's the short version: this is a $124 billion bet on whether Intel can actually pull off its foundry turnaround.

For over a year, Apple and Intel have been in intensive talks. They hammered out a formal deal in recent months, according to people familiar with the matter. The stakes couldn't be higher for Intel, which has been pouring billions into retooling its manufacturing operations after losing ground to Taiwan Semiconductor Manufacturing Company (TSMC) for years.

Here's what matters for your portfolio: Can Intel actually execute?

The bull case is straightforward. If Intel successfully manufactures Apple chips, it validates their foundry strategy and potentially reshapes the semiconductor landscape. Apple gets supply chain diversification away from Taiwan. Intel gets the prestige client that proves they're back in the game. Everybody wins.

The bear case is equally simple: Intel has a history of overpromising and underdelivering on manufacturing timelines. They're still burning billions getting their foundries up to speed, and they're at least a year or two away from operational profitability. According to reports, Apple is planning to use Intel only for lower-end chips initially, not their flagship processors. That's not exactly a ringing endorsement.

This is classic "vote of confidence" territory. If Intel stumbles on execution, Apple has a supply problem and Intel's stock gives back these gains. If Intel delivers, the semiconductor industry power structure shifts meaningfully for the first time in a decade.

For retail investors holding semiconductor stocks, this changes the equation. Intel went from "struggling legacy chipmaker" to overnight in the market's eyes. But remember: stock prices move on expectations. Actual chip production is still months or years away.