Even though the Chinese government has persistently been trying to prevent further stock market losses by drawing the line around the 3,500 level for the Shanghai Stock Exchange Composite Index (SHCOMP), it is questionable whether it will continue to provide support in order to sustain this market level indefinitely, as it is proving to be a very expensive exercise.
Refer to the input text as context and select the correct relationship between 'stock market' and 'Stock Exchange' from the available options.
Options: legal form, manufacturer, parent organization, operator