Last week the S&P500 hit an all-time high, throwing off years of sluggish performance.

To underline that, just compare the S&P with Britain’s FTSE100. Over most of the past seven years, the Footsie has steamed ahead of its U.S. equivalent. In the last five years the UK index has leapt 50 percent compared with 12 percent in American markets. Over the past three years, the S&P500 has returned 30 percent set against 64 in the UK.

Since 2000, the U.S. index has fallen overall by 8 percent compared with a gain of 32 percent by the Footsie.

Peter Seilern of Seilern Investment Management responds, “People talk about the trade deficit which is no worse than many eurozone countries. And if you look at valuations, the S&P500 is trading at about 18 times earnings, which is neither cheap nor expensive. America has a culture of enterprise and some of the best managed companies in the world.”

Cormac Weldon, head of U.S. equities at Threadneedle, says, “There are now sound reasons for investors to reassess their allocation to the U.S. market.”

Surveys have shown that women invest in the stock market far less than men do; they have a different view on the risks and possible gains and are much less confident of their ability to invest wisely. But, when they do try the stock market, they generally do better than men, choosing dependable stocks and ignoring the get-rich-quick options.

Kiplinger suggests that couples should invest together, thereby complementing each other’s strengths and weaknesses. The man can encourage investments in higher yield stocks and the woman restrain him from his wilder excesses.

Which seems like a good plan to me!