...Oracle Corp.'s adjusted leverage continues to climb as it engages in large share repurchases.Oracle Corp. has significantly ramped up shareholder returns since the passage of the U.S. tax reform in late 2017, with share repurchases totaling $36 billion in fiscal 2019 (ending in May), albeit declining to a pace of $5 billion per quarter for the current fiscal year. This still outstrips annual cash flow ranging from $12 billion-$13 billion annually. Although it has repaid maturing debt during this period, net debt stands at $24 billion as of November 2019, up from a net cash position of $7 billion the end of fiscal 2018. Under our base-case scenario, which assumes share repurchases of around $20 billion per year through fiscal 2021, we estimate that Oracle's adjusted leverage could exceed our downgrade threshold of 2x over the next several quarters, which the company could mitigate by adjusting share repurchases. Oracle's strength in database is a key credit support. Oracle has a leading...