For Britons, it's party time! They are expected to spend £243million on memorabilia, champagne and food for parties. Kensington Palace is likely to benefit from the birth of the royal baby- from a range of royal-themed baby clothes and gifts already available in its online shops.

According to Global Financial Data, The Wall Street Journal's Market Watch has found a direct correlation between Royal births and UK stocks.

Before Queen Elizabeth's birth in 1926, the FTSE started rising and increased by almost 4% in the three months following her birth. By the time the now Queen of England had her first birthday, investors had seen a 13% increase in their share portfolios.

Granddad Prince Charles also had an impact on the share market. In the months leading up to his birth in November 1948, UK stocks rallied by 15%.

According to the data, by the time Prince William was three months old, UK stocks were 12% higher. By June 1983 when the young Prince was one year old, the FTSE Index had increased by a further 51%.

William and Kate's investment had matured; the royal baby is born. Now UK investors are on high hopes that their portfolios can continue to increase following the Royal birth.

The whole UK economy is also projected to grow. Transactions of Royal baby things, festive food and liquor are predicted to generate around £240 million, according to the Centre for Retail Research.

The Royal Collection Trust, which generates millions of dollars in tourism sales each year to preserve the Royal residences, is likely to rake in a further £67 million in the coming month.

All big business for a tiny arrival.

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