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Economy in Brief

Foreign Purchases of U.S. Securities Ease in May Amid Wide Volatility
by Carol Stone July 16, 2004

The US Treasury today published its array of monthly data on foreign investors' purchases and sales of "long-term" US securities (having maturity greater than one year) for May. Known as the "TIC" data for Treasury International Capital", this extensive collection of information on foreign participation in US capital markets is contained in Haver's USINT database in the section "US International Investment Tables", shown by security type and country. In May, net foreign purchases of securities traded in US markets totaled $56.4 billion, down from April's $76.1 billion.

The first graph above shows a simple history of these net foreign purchases of securities in US markets. Besides the simple fact that these transactions have expanded dramatically since about 1985, the most recent periods have also shown significant volatility. Simple explanations are often offered for this activity: a large current account deficit that must be financed, fear of a weakening dollar, the impact of a rising dollar, and so on. Indeed, the current account relationship is significant: aggregated on a quarterly basis, the value of these transactions has had a 90% negative correlation with the current account balance over the past 20 years. But the wide swings in the capital flows, particularly over the past year-and-a-half, suggest that causes for foreign moves in and out of US markets must be much more complex.

The second graph examines the interaction in these data with a broad gauge of the exchange rate. Using the Fed's "Broad" trade-weighted dollar index, we see an attractive-looking 70% correlation over the past 15 years. However, this correlation coefficient changes markedly over varying time periods. So while the fit may be pretty good over the years we illustrate, during the last 10 years, that drops to just 44%. An earlier 10-year period, 1986-1995, shows a mere 1%. Thus, it's hard for investors and traders to count on a particular securities market response to foreign exchange developments. And these relationships deteriorate further when individual countries are examined. The correlations between the yen and net capital flows of Japanese investors generally run in the mid-20% area.[Note that all our comments are based on examination of data properties revealed using Haver's DLXVG3 software alone. With the "correlation" tool turned on, scrolling across the graph using the arrow keys shows the evolution of the correlation ratio through time.]

Monthly Average
Net Foreign Purchases of Securities in US Markets 
(Billions US$)
May 2004 Apr 
2004
Mar
 2004
May 
2003
2003 2002 2001
Total
56.4 76.1 76.8 109.9 58.4 47.9 41.8
Treasuries
21.9 35.3 61.5 41.1 22.7 10.0 1.5
Federal Agencies (mostly "GSEs")
20.7 31.0 3.9 31.9 13.6 16.3 13.7
US Corporate Bonds
19.9 16.8 30.4 27.4 22.7 15.2 18.5
US Corporate Stocks -7.6 -1.8 -13.4 6.6 3.1 4.2 9.7
Foreign Bonds 7.4 6.1 -1.7 13.5 2.2 2.4 2.5
Foreign Stocks -5.8 -11.3 -4.0 -10.9 -6.0 -0.1 -4.2
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