The Nasdaq Stock Market Inc. is cutting trading prices for transactions of a certain size.

Nasdaq said that it has lowered transaction pricing for the top tiers for removing liquidity in all securities, and for routing all securities, excluding non-ETFs routed to the NYSE.

It will now charge US0.26¢ per share for transactions where greater than 35 million shares are added and greater than 55 million shares removed or routed, or more than 25 million shares added and greater than 65 million shares removed or routed. Trades where more than 20 million shares added and greater than 35 million shares removed or routed will cost US0.28¢ per share. And, all other trades will be charged US0.3¢ per share.

These pricing changes have been filed with the Securities and Exchange Commission, effective immediately.

Nasdaq also plans to pass through new routing charges from the NYSE, effective March 5. It reports that the NYSE recently filed with the SEC to increase their Linkage Order Fee for transactions routed to other markets. Nasdaq will pass through this routing fee of US0.25¢ per share on orders sent to and subsequently re-routed by the NYSE. This pass-through fee is in lieu of, not in addition to, other routing fees.

Nasdaq says it does not expect the pricing change to have a material effect on financial results. It also confirms its 2007 full year guidance that it gave on its first quarter earnings call on February 13. Gross margin is expected to be in the range of US$755 million to US$775 million, total expenses are expected to be in the range of US$390 million to US$410 million, and net income is expected to be in the range of US$180 million to US$190 million.