‘This is nuts’: A 28-year market vet shares 5 warning signs that investor psychology is getting out of control — pushing stocks increasingly toward bubble territory

• Lance Roberts warns that bullish investor psychology may push the stock market into a bubble.
• Indicators like the price-to-sales ratio and sentiment surveys suggest broad speculation.
• Roberts cautions that increased market exuberance could result in future financial pain.

Lance Roberts has three words to describe the current stock-market environment: “This is nuts.”