Do leveraged ETFs, ETFs in general, affect the underlying indexes?

[cyjackx]

If everybody piled into a leveraged S&P ETF like SPXL, for example, does that affect the S&P? And does that affect the S&P's constituents?

Does it matter that overbuying SPXL still wouldn't make it deviate from 3X SPY? Are leveraged ETFS subject to the same ideas of supply and demand?

 

[userque]

If everybody piled into a leveraged S&P ETF like SPXL, for example, does that affect the S&P? And does that affect the S&P's constituents?

Does it matter that overbuying SPXL still wouldn't make it deviate from 3X SPY? Are leveraged ETFS subject to the same ideas of supply and demand?

This may help:

http://webcache.googleusercontent.c...liquidity-concerns+&cd=56&hl=en&ct=clnk&gl=us

Googling 'etf liquidity trading price volume' may find more information.