For non-share dollar amounts (e.g. day gain, total gain, market value), I find that showing the cents part of the value is just visual clutter, so I'd appreciate to not see. It could be a view option, or perhaps have versions of each field, along the lines of "Total Gain Unrealized ($)" and "Total Gain Unrealized ($.$$)", where the latter represents the current default.

In either case, perhaps have a mouseover show the full value? I wouldn't use this, but it'd be a tidy addition.

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