This paper presents a stock investment strategy that can be applied relatively effectively under the current situation. We propose to design this recommendation based on the analysis of three main fields: finance, economics, and marketing. We examine and identify the damage extent of COVID-19 towards the economy and market, promising stock type nowadays, and methods of hedging the risks. These three aspects are attained by stock valuation, option valuation, sensitivity analysis, and marketing analysis research. According to the result of our previous studies, the comparatively optimal stock investment strategy was proven to be highly related to three elements: stock type, which should be high-tech related. Company size should be relatively small or middle-sized, and risk hedging is achieved by purchasing power. In particular, these three aspects are more efficient and significant under the current economic crisis period.