In March 2009, the S&P 500 bottomed at 666. Today it’s about 2,500,
that’s a 275 percent increase over 8 years. This (U.S. stocks) bull run has
been strong and long lasting. A Trump victory has given credence to the fact
that there is “more room to run”. But is that true?
The total market cap (TMC) to GNP ratio, or the Buffett indicator, is
“probably the best simple measure where valuations stand at any given moment”.
The chart below is the current ratio of total market over GDP (proxy for GNP)
and its historical range.
(Source: AdvisorPerspectives.com)
The ratio cannot be used to compare the valuation levels of different
nations. Some are driven by large public listed companies, others by
state-owned companies. Then there are differences in reporting, accounting
rules, regulations and tax laws. Further, some suffer from low equity ownership.
For example, India has only 4% of adult population who own stocks compared to
52% in the U.S.
Country
|
GDP ($Trillion)
|
Total Market/GDP Ratio (%)
|
Historical Min. (%)
|
Historical Max. (%)
|
Years of Data
|
19.25
|
134.9
|
35
|
149
|
47
|
|
12.43
|
48
|
41
|
662
|
27
|
|
4.55
|
150
|
56
|
361
|
33
|
|
3.69
|
53
|
13
|
58
|
27
|
|
2.65
|
92
|
52
|
182
|
27
|
|
2.6
|
124
|
47
|
201
|
45
|
|
2.46
|
68
|
40
|
158
|
20
|
|
2.16
|
15
|
10
|
45
|
17
|
|
1.97
|
48
|
26
|
106
|
20
|
|
1.72
|
121
|
78
|
190
|
27
|
That said, the U.S. current market cap/GDP ratio of over 135 per cent could
be problematic, if you subscribe to Buffett’s mantra. As he (Buffett) says,
“for investors to gain wealth... the percentage relationship line... must keep
going up and up”. And if it gets too high, Buffett says you’re “playing with
fire”.
The cyclical-adjusted-price-to-earnings (CAPE) ratio of a stock is
another standard metric used to evaluate if a market is overvalued or
otherwise. This metric was developed by Robert Shiller of Yale and popularised
during the Dotcom Bubble. It’s a variant of the typical price-to-earnings (P/E)
ratio of stocks.
When the
CAPE ratio is high, it’s usually wise to reduce equity exposure.
CAPE Ratio S&P 500
(Source: http://www.multpl.com/shiller-pe/)
The CAPE
and Market Cap/GDP ratio generally correlate closely.
So is the
U.S. market overvalued?
Robert Shiller suggests long-term investors to cut back on their equity
holdings. At this level, he suggests that “the expected return for stocks might
be negative, but only slightly so”. Shiller adds, “... it’s quite reasonable to
have an investment in U.S. stocks as part of a diversified portfolio... but
don’t go overboard on it”.