Most investors/readers know about the stream of U.S. economic statistics originating from the U.S. Commerce and Labor Departments, and from other Washington agencies, that form the basis for 'taking the pulse' of the economy.

But more experienced investors know about that group of 'unofficial statistics' that fill-in the economic landscape and frequently provide clues regarding future economic activity that the others do not. In this category, you'll find mall traffic levels, those infamous corrugated box orders, and package deliveries, as metrics of significance.

And another metric worth keeping an eye on, in the interpretation of stock exchange specialists? The demand and prices for fine art.

Fine art, antiques, and collectibles are the aesthetic knick-knacks of the gentry. Or as one New York Stock Exchange (NYSE: NYX) specialist put it, "A lot of the other metrics measure how the little guy is doing. Art demand measures how the big guys are doing."

The significance? "When the little guy is pulling back, that's a concern. But when the big guys are pulling back, now that's a problem," he said.

Art demand slowdown telegraphing global slump?

Moreover, a problem may be surfacing with the 'big guys.' Sotheby's, the world's largest, publicly-traded auction house has dropped about 20% in the past week on concern the global art market may be slowing, Bloomberg News reported. Sotheby's (NYSE: BID) shares declined 39 cents to $22.64 in Friday afternoon trading.

Sotheby's contemporary art auction on Wednesday was not a confidence builder. The sale totaled $10.4 million, well below the $14 million high estimate, will only 69% of lots selling, Bloomberg News reported. In comparison, during a similar sale a year ago, 81% of lots were purchased.

The choppy/consolidating (or perhaps worse) market conditions sometimes give the impression that growth plays do not exist, but that is not the case, and one growth company worth reviewing is Sotheby's.

Sotheby's (NYSE: BID) is the world's second-largest auctioneer of fine arts, antiques and collectibles, offering property in numerous collecting categories, including paintings, jewelry, decorative arts, and books.

Analysts expect Sotheby's to register strong revenue growth in 2008, with an improving financial position, and modest debt. Furthermore, costs remain reasonable. The Reuters F2008/F2009 EPS consensus estimates for the company are $2.82/$3.14.

Tired of seeing your expensive and carefully chosen gifts end up months later as the flotsam and jetsam of post-holiday shores?

It's fun to buy stuff. But remember last year's failures -- that robotic pet that broke two weeks after Christmas and the pricey pale pink cashmere sweater your husband will never wear. And now he wants another iPod, like the one that went missing a few months ago?

This year choose gifts that will keep on giving. For your immediate family -- especially your kids -- make finding a gift that will actually appreciate in value a priority. Even if you end up buying them some cheap junk to fill up all the space under the Christmas tree, be sure to choose at least one gem that will last and hopefully grow in value.

The following is a range of gift ideas could apply to spouses, kids, mom, dad and even grandma and grandpa. They may not be worth more next year, but you can bet that in 20, 40 or 60 years time, they will all be worth more than that HDTV you're contemplating buying now.

1. Jewelry. Think gold, silver platinum. You can't go wrong.

2. Gold or silver coins. Put one or two in a nice velvet bag. They are pretty and fun as well as excellent stores of value.

3. Savings bonds. It's hard to jazz these up. But get your kids or nieces and nephews some to sock away. They may not squeal with delight when they open the envelope, but they will appreciate them later on.