Except for the fact that in determining your turnover you exclude input taxed supplies (noting that the sale of shares are financial supplies and financial supplies are a category of input taxed supplies). So its not as simple as just saying "turnover is down by 30% therefore you qualify".
Refer to step 2 under the subheading "Decline in turnover - basic test" under the heading "Eligible employers" on the following link.
https://www.pwc.com.au/important-problems/coronavirus-covid-19/guidance-on-tax-obligations-and-relief-for-businesses-affected-b/jobkeeper-payment.html#frequently-asked-questions
