There are times when you need to have a ton of money in cash or near-cash (e.g. saving for a down payment for a first home), and then it makes a lot of sense to

There are times when you need to have a ton of money in cash or near-cash (e.g. saving for a down payment for a first home), and then it makes a lot of sense to optimize. For a normal emergency savings fund, it does not make sense (unless you legitimately enjoy doing it!)