MicroStrategy Inc (NASDAQ:MSTR) shares are trading lower in Monday’s after-hours session after the company announced an offering. What Happened: After the market close on Monday, MicroStrategy said it intends to offer $600 million worth of convertible senior notes due 2030 in a private offering to qualified institutional buyers. The company plans to grant the initial purchasers a 13-day window to buy an additional $90 million worth of the notes. MicroStrategy said it intends to use the net proceeds from the sale of the notes to acquire additional Bitcoin, as well as for general corporate purpo…