Income Taxes. Our effective income tax rate was 9.2% for the fiscal year ended April 30, 2019, as compared to 30.0% for the fiscal year ended April 30, 2018. The provision for income taxes for the fiscal year ended 2018 included the impact of the Tax Cut and Jobs Act of 2017, inclusive of a reduction in the blended fiscal year 2018 federal statutory tax rate from 35% to 30.4% and a $3.3 million one-time expense resulting from the remeasurement of our deferred tax assets and liabilities.
Equity method investment loss, net of tax. Equity method investment loss, net of tax for the fiscal year ended April 30, 2019 was $3.9 million, as compared to equity method investment loss, net of $1.3 million for the fiscal year ended April 30, 2018. The increase was due to the equity method loss associated with our investment in the HAPSMobile joint venture formed in December 2017 and our increase to 10% ownership in March 2019 which was diluted to approximately 5% during the first fiscal quarter of fiscal year 2020.
Gain on sale of business, net of tax. Gain on sale of business, net of tax for the fiscal year ended April 30, 2019 was $8.5 million, as compared to $0 for the fiscal year ended April 30, 2018. The gain on sale of business, net of tax, for the fiscal year ended April 30, 2019 resulted from the sale of our former EES Business.
Loss from discontinued operations, net of tax. Loss from discontinued operations, net of tax for the fiscal year ended April 30, 2019 was $3.0 million, as compared to a loss from discontinued operations, net of tax of $3.9 million for the fiscal year ended April 30, 2018. The loss from discontinued operations, net of tax related to the results of our EES Business.
Liquidity and Capital Resources
We currently have no material cash commitments, except for normal recurring trade payables, accrued expenses and ongoing research and development costs, all of which we anticipate funding through our existing working capital and funds provided by operating activities. The majority of our purchase obligations are pursuant to funded contractual arrangements with our customers. We believe that our existing cash, cash equivalents, cash provided by operating activities and other financing sources will be sufficient to meet our anticipated working capital, capital expenditure and debt service requirements, if any, during the next twelve months. There can be no assurance, however, that our business will continue to generate cash flow at current levels. If we are unable to generate sufficient cash flow from operations, then we may be required to sell assets, reduce capital expenditures or obtain additional financing. We anticipate that existing sources of liquidity and cash flows from operations will be sufficient to satisfy our cash needs for the foreseeable future.
Our primary liquidity needs are for financing working capital, investing in capital expenditures, supporting product development efforts, introducing new products and enhancing existing products, and marketing acceptance and adoption of our products and services. Our future capital requirements, to a certain extent, are also subject to general conditions in or affecting the defense industry and are subject to general economic, political, financial, competitive, legislative and regulatory factors that are beyond our control. Moreover, to the extent that existing cash, cash equivalents, cash from operations, and cash from short-term borrowing are insufficient to fund our future activities, we may need to raise additional funds through public or private equity or debt financing. In addition, we may also need to seek additional equity funding or debt financing if we become a party to any agreement or letter of intent for potential investments in, or acquisitions of, businesses, services or technologies.
Our working capital requirements vary by contract type. On cost-plus-fee programs, we typically bill our incurred costs and fees monthly as work progresses, and therefore working capital investment is minimal. On fixed-price contracts, we typically are paid as we deliver products, and working capital is needed to fund labor and expenses incurred during the lead time from contract award until contract deliveries begin.
To date, COVID-19 has not had a significant impact on our liquidity, cash flows or capital resources. However, the continued spread of COVID-19 has led to disruption and volatility in the global capital markets, which, depending on future developments, could impact our capital resources and liquidity in the future. During the three months ended April 30, 2020, in consideration of the impact of the COVID-19 pandemic, we made the strategic decision to sell a significant