Stabilisation of Hong Kong dollar V. M. Grayburn acted as chief manager of the HSBC in March 1930 in succession to retiring
A. C. Hynes and was officially appointed by the board in July. . Although Hong Kong's trade was benefited shortly from the decline of Hong Kong dollar, the exchange rate went up again after the
pound sterling,
Japanese yen and
US dollar significantly devalued after they were taken off from the
gold standard and Hong Kong's trade was damaged heavily. The US Silver Purchase Act of 1934 also created an intolerable demand on China's silver coins and pushed up the global silver price. V. M. Grayburn was appointed member of the Economic Commission to advise Governor
William Peel on the monetary issues in July 1934. The report of the commission in February 1935 concluded the Hong Kong government should not abandon the silver standard as China, the colony's largest trading partner remained on it. The
Chinese Nationalist government announced the abandonment of the silver standard in November 1935 due to the instability of the currency. The Hong Kong government followed China shortly afterward. The Dollar Currency Notes Ordinance of 1935 was passed by the
Legislative Council on 9 November. Despite the currency coins and notes issued by the Hong Kong government, the currency notes issued by the HSBC and two other British banks in Hong Kong were also recognised as legal tenders in Hong Kong. Under the Exchange Fund Ordinance of 1935, the HSBC had to submit its silver holdings in exchange for the Certificates of Indebtedness, as the legal backing for all banknotes. In December 1935, the government appointed Grayburn a member of the Exchange Fund Advisory Committee, to continue to advise the government on monetary issues. For his services for the establishment of the Hong Kong dollar as the monetary unit, Grayburn was knighted in May 1937
in honour of the coronation of
George VI, which made him the second chief manager of the HSBC to receive the honour after
Sir Thomas Jackson, 1st Baronet. The plan for a new headquarters building were finalised in 1931. The office was moved out on 10 October 1933 and the construction was taken place at the same site of the torn down old building. M. V. Grayburn was the head of the plan while the chief accountant
Arthur Morse was responsible for the budget. The new building was designed by architect
G. L. Wilson from the
Palmer and Turner. The committee, in which V. M. Grayurn was part of it, concluded an income tax would be the best new tax to be introduced however remained in reservations for the legitimacy of the taxation. The Income Tax Bill was subsequently passed in the Legislative Council despite strong opposition from the unofficial members and the business community. He also assisted the
Royal Hong Kong Yacht Club to move from
North Point to
Kellett Island where the club locates today. He was the chairman of the board of the
Matilda Memorial & War Hospital and set up a $500,000 fund for the hospital. He was appointed the unofficial member of the
Executive Council in July 1941. He held the office until the
fall of Hong Kong to the Japanese army in December. Before Hong Kong was occupied, V. M. Grayburn had already appointed Arthur Morse to the London office and transferred Bank's assets to London supported by the British government. The bank had also a large amount of US dollar reserve in the United States to avoid its assets being frozen if the Hong Kong office was fallen into Japanese's hand. In 1941 the British government appointed Morse as acting chief manager and chairman and commanded all branches of HSBC to follow order from London. 12 December 1941, Hong Kong Governor
Mark Young announced London to replace Hong Kong as the headquarters of the bank. The Hong Kong government surrendered to Japan on Christmas Day of 1941. ==Japanese occupation==