Don't look for Nike ( NKE) to buy Under Armour ( UARM), Jim Cramer said on CNBC's "Stop Trading" segment Monday. "Shouldn't they have bought Under Armour before it came public and not have to pay these prices?" asked Cramer, who said he was trying to shoot down some aggressive efforts by hedge funds trying to get stocks up. "If you buy Under Armour, buy it for the fundamentals." Cramer warned against buying technology stocks such as Intel ( INTC) and Dell ( DELL) on the theory that they have no farther to fall. "Every time you try to catch the bottom, it's just like a knife in your hand." Cramer explained the relatively sturdy performance in stocks such as Johnson & Johnson ( JNJ) and Procter & Gamble ( PG) as a preference among money managers for shares that might "go up $3, come down $1" for the rest of the year, vs. free-falling tech. As another example of the latter, take Advanced Micro ( AMD). "They screw up, and now they're down another $15 from where they screwed up. You cannot make a mistake in tech." Earnings might not provide much relief. EMC ( EMC) and AMD "represented a substantial part of what would go well this quarter, and they don't," Cramer said. "Bad news is catastrophic in the sector."