* Projects Q4 loss on pricing weakness, Florida economy

* Current bookings indicated positive yields in '10- CEO

* Shares stumble on the NYSE (Recasts; Adds comments from CEO interview, new analyst comment)

By Deepa Seetharaman

NEW YORK, Nov 3 (Reuters) - Royal Caribbean Cruises RCL.N <RCL.OL said on Tuesday that lower-than-usual prices for holiday cruises and Florida's sluggish economy would pinch fourth-quarter revenue and it forecast a loss for the period.

The world's second-largest cruise operator projected a loss of 5 cents per share for the fourth quarter. Wall Street had been expecting a per-share profit of 4 cents, according to Thomson Reuters I/B/E/S.

The company said that bookings for holiday cruises were not commanding their usual premium. Eleven-percent unemployment and a weak real estate market in Florida would also dent results.

"The fourth quarter has historically always been the most price-sensitive quarter," said Chief Executive Richard Fain in a Reuters interview. "If you're at the margin, relatively small changes in a steeper curve end up having a bigger impact."

Royal Caribbean's earnings fell 44 percent for the third quarter, but surpassed analysts' expectations as close-in bookings showed strength. Cruise bookings since mid-September were up 40 percent compared with the same period last year.