The period 1719-20 saw an upsurge in joint stock flotations with
marine insurance being prominent. Amongst the embryo schemes were ones by Stephen Ram and James Colebrook and these provided “the seed” for London Assurance. Colebrook was a merchant banker and a heavy subscriber to the combined society. Stephen Ram was a member of the Court of the
Goldsmiths Company, a treasurer of Corr’s lottery and had enjoyed mixed success with other speculative ventures. The London Assurance flotation came in January 1720 and was spectacularly successful, its share price rising even faster than that of the
South Sea Company. However, the scale of the speculation led to the passing of the
Bubble Act in June 1720. This forbade the formation of
joint stock companies unless enabled by
royal charter but it also specifically allowed the incorporation of London Assurance and the
Royal Exchange; it also granted the two companies a corporate monopoly of marine insurance (the individual underwriters that were eventually to coalesce into
Lloyd’s of London continued to trade and still dominated the market). In August the share price of the South Sea Company began its collapse: the London Assurance share collapse was even greater falling from a high of £160 to £2. ==Early history==