SPX Topping Valuations

 | Apr 20, 2014 02:21AM ET

The lofty stock markets are starting to wobble, with selloffs’ frequency and sharpness increasing. The dominant reason the Fed’s stock levitation is running out of steam is severe overvaluation. Stocks are just far too expensive today compared to historic precedent, a dangerous state seen when bull markets are topping. Rampant overvaluation is a glaring warning sign to investors that selling is just beginning.

Investing is all about buying low then selling high. So the price paid for any particular stock is the most-important and often dominating factor in its ultimate price-appreciation success. The surest way to grow rich in the stock markets is to buy good companies at low prices, the prudent contrarian approach. Even buying great companies at high prices leaves little room for those stocks to run higher, so they rarely do.

Low and high stock prices are not defined by absolute share levels, which are irrelevant. A $10 stock can be expensive while a $100 stock is cheap. The key is valuations, or where any stock price is trading relative to its underlying company’s earnings stream. The lower any company’s stock price compared to its profits, the cheaper it is. The more earnings investors can buy per dollar of share price, the better.

This concept is so simple, yet most investors foolishly choose to ignore the valuation price they are paying. Imagine buying a house as a rental property, with expected annual rental income of $30k. If you can get that house for $210k, 7x earnings, it will pay for itself in 7 years. That’s a great deal! But if that same house is priced at $630k, 21x, it’s a terrible deal. It will take far too long to earn back your investment.

Price paid is everything, yet stock investors don’t hesitate to pay 21x earnings and higher for stocks! While not only irrational, a century and a quarter of US stock-market history shows this rarely works out well for investors. And the flagship US broad-stock-market index, the S&P 500, is now priced well above that 21x historical expensive level. Such valuations usually signal a major bull-market topping underway.

The S&P 500 is also known by its symbol SPX, and is widely traded through several massive tracking ETFs. These include the SPDR S&P 500 ETF traded as SPY, the Vanguard S&P 500 ETF traded as VOO, and the iShares Core S&P 500 ETF traded as IVV. Of these, the oldest, most venerable, and most popular by far is SPY. Born way back in early 1993, this ETF has become the SPX’s definitive tracker stock.

Comprised of 500 of the biggest and best American companies, the SPX (or SPY) is the best gauge for the broad US stock markets. Across these elite stocks is where market valuations are best measured. And if you pull up SPY in Yahoo! Finance, it reportedly has a “trailing-twelve-month” P/E of 17x. That remains far from the expensive 21x level, not a cause for concern. The problem is that is totally false!

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Back in early 2000 when I founded my company Zeal, the financial internet was in its infancy and stock-market valuation data was much harder to come by. So in order to capture it, at the end of every month we started feeding all the valuation data for each of the 500 individual SPX component companies into a spreadsheet. Then, and every month since, we averaged them all to get the broad-market valuations.

As of the end of March 2014, the simple average of all 500 SPX companies’ trailing-twelve-month P/E ratios scraped directly from Yahoo! Finance as well was 25.7x earnings! This is vastly higher than the 17x reported for SPY, VOO, and IVV. Why? Maybe Yahoo! Finance is using an index-earnings practice common on Wall Street, aggregation. All 500 companies’ profits are added up, then divided by the SPX level.

Using aggregate rather than individual earnings is very misleading, a flawed methodology. A relatively small number of companies with outlying huge profits, often from one-time events like asset sales, can seriously skew an entire index’s valuation. Wall Street loves aggregation because it masks overvaluation within individual stocks, making the stock markets look cheaper and safer than they actually happen to be.

Another Wall Street trick to hide rampant overvaluations is using forward earnings, or estimates of future earnings. The problem is these guesses are always far too optimistic. They start out at super-profitable a year or so out, and gradually retreat back towards more realistic levels as a quarter nears. Forward P/Es are based on a fantasyland of ideal economic and operational results, something that almost never plays out.

I suspect Yahoo! Finance’s 17x “ttm” P/E for SPY is really a forward one, as that’s about where the SPX’s forward P/E is trading these days. Wall Street loves quoting forward P/Es since they make the stock markets look far more reasonably priced than they really are. The normal P/E slot on Yahoo! Finance’s stock-quote template has a “ttm” label, but there’s no way its index quotes show trailing-twelve-month P/Es.

This first chart shows the real valuation picture, and it is ominous. Once again our methodology at Zeal is simple, we scrape all 500 SPX component companies’ individual trailing-twelve-month P/E ratios (which are hard historical facts) off Yahoo! Finance. Then we average them two ways, simply and by each company’s individual market capitalization. Both are rendered below, but the market-cap weighting is superior.

Larger companies are more important to investors than smaller ones, with more shares held and more capital at risk. Weighting SPX components’ P/Es by their market caps offers a more realistic picture of overall valuations. It better reflects earnings multiples of companies most held by investors, and minimizes any skew from smaller companies with very high valuations. The SPX is now dangerously overvalued