The roller coaster ride continues. The Creativity Production Index (CPI) - the average number of spots produced by a sample of agency offices - declined for the second straight month, falling to a seven-month low of 9.8. Numbers from the Los Angeles Film Office confirm the downward trend. Commercials production days have declined there for four straight months, hovering just above 2001 stats. As usual, the CPI is following the ebb and flow of the economy, and the recent Wall Street beating hasn't helped. Fortunately, come fall, advertisers will have to fill all that network time with something.