Stocks making the biggest moves premarket: Fair Isaac, SpaceX, AMD & more

Check out the companies making the biggest moves premarket: Fair Isaac — Shares plunged 18% after Federal Housing Finance Agency director Bill Pulte introduced changes to mortgage pricing. "We are Simplifying Mortgage Pricing following feedback from lenders and consumers. Instead of two separate pricing grids, which makes zero sense, Fannie and Freddie are hereby moving to ONE PRICING GRID with VantageScore joining the existing FICO Classic pricing grid," Pulte said in a post on X. AMD — The chipmaker traded more than 1% higher after it acquired AI firm World Labs for $8.2 billion . Bloomin' Brands — The parent of Outback Steakhouse jumped 5% following a JPMorgan upgrade to neutral from underweight.