SPY/QQQ Odd Lots?

I know it's possilbe to trade odd lots on SPY/QQQ, but will there by any detremental effect on execution speed or fill? Thanks.

 

trade it on island.

 

mind explaining why?

 

where you will get your odd lots ...

most of the time I think

 

Not necessarily since their liquidity is high enough. You will have executions problems with volume <50K