Zoom is also cutting expenses to boost profitability. Operating expenses fell by 1.4% during fiscal Q2, but a major addition to its balance sheet was its gain from interest. Because Zoom holds around $6 billion in cash and marketable securities, interest from its cash stockpile is a big part of Zoom's profitability. Many interest-bearing accounts now pay around 4.5% on deposits. On a $6 billion sum, that would translate to around $68 million per quarter in interest revenue. Zoom reported interest revenue of $68.4 million, so this checks out.