4 reasons the blistering tech rally won't last much longer, according to a veteran strategist

NYSE

• Tech stocks have been on a tear, sending the Nasdaq Composite to records.
• Market strategist Jim Paulsen says there's a number of "yellow flags" flashing, however.
• The investing pro laid out four reasons that tech stocks could be headed lower.

Tech is red-hot again, but be warned: that might not last much longer, according to one longtime investing strategust.

The Nasdaq Composite is on track for its sixth consecutive week of gains, and has risen more than 18% in just the last month.