CNBC president Mark Hoffman sent a note to his staff today about the network's October performance calling it "our best October since 2003 in the key demographic of adults 25-54."

In A25-54 CNBC's business day (5amET-7pmET) is up 10% from last October. "Since a new challenger launched on Oct. 15," Hoffman writes, "CNBC is up 15% for Business Day in adults 25-54 compared to the two weeks prior to its premiere."

Other gains: Monday-Friday primetime, Weekend prime, and time period improvements at 5pmET with Fast Money and at 7pmET with Kudlow & Company." Even a colleague from a competing network was talking up CNBC's gains to me today.

Click continued to read Hoffman's note...

Our measured ratings in the U.S. for October are in and they're excellent. This marks the 22nd month in a row that our ratings for Business Day out-perform the same month a year earlier.

Of course, these are only measured ratings. As you know, the majority of CNBC's affluent and well-educated audience isn't counted by Nielsen because they neither measure out-of-home viewing nor affluent homes.

But, that being said, this will be our best October since 2003 in the key demographic of adults 25-54. Our measured ratings in Business Day (5 AM-7 PM ET) are up 10% from last October. It is also interesting to note that, although advertisers don't make decisions based on total viewing numbers, CNBC is up there as well — by 25%, making this the best October since 2001.

Since a new challenger launched on Oct. 15, CNBC is up 15% for Business Day in adults 25-54 compared to the two weeks prior to its premiere.

In Monday-Friday primetime, CNBC is up 16% in adults 25-54 and up 36% in total viewers; that's our best October in weekday primetime since 2002. Weekend prime had its best October since 2001.

In its new 5 PM time period, "Fast Money" improved the time period by 42%. In its new 7 PM time period, "Kudlow & Company" has improved the 7 PM time period by 48% since its launch.

Congratulations on another great month and thank you all for the passion and expertise you bring to CNBC every day.