The price of equities is not known.  The market is how that price is calculated.<p>You could slow down the process, but that adds risk (that one party is getting the wrong price).  The market makers would say, I&#x27;ll sell you one 1 share for $1,  10 shares for $1.20, 100 shares for $2, 1000 shares for $10.  So then someone who wants to buy 1000 shares for $1 a share will buy only 1 share at $1.  Then in the quiet period, the market makers will adjust their prices.  1 share for $1.01, etc.  Then you&#x27;ll sell another share for $1.01.  Then you&#x27;ll wait 5 minutes, and the market makers will adjust their price.<p>The market is going to work the same way at 5 minute delay as it works at nanosecond delay, but just be slower.  The market makers won&#x27;t be getting you a better price, and your large transaction won&#x27;t not affect the share price.