you do the math-
http://finance.yahoo.com/q?s=qqqq
qqqq-
Volume: 39,053,800
Avg Vol (3m): 17,353,700
http://finance.yahoo.com/q?s=spy
spy-
Volume: 358,182,347
Avg Vol (3m): 199,173,000
dia-
Volume: 39,053,800
Avg Vol (3m): 17,353,700
http://finance.yahoo.com/q?s=dia