Again, the *more* lopsided the market becomes (as 5 tech names keep growing) the *less* breadth matters. Big names all that matter.
People have been noting the terrible breadth for many months. And yet SPX in middle of 2nd longest streak since 1928 without 3% drop.
Now if there's a domino effect from depressed energy into banks taking huge losses that causes a financial/economic problem - yes, of course