Gilead can write a check now for $24 billion ($14 Billion on hand plus the $10 new debt)... but this is small compared to what they have available for an acquisition(s) since they are cash flowing about $22 billion per year on top of that... this gives them a lot of room for more debt and also Buy outs are usually financed by a combination of equity and debt...IMO Gilead could spend up to $2 or $3 hundred billion on acquisitions (of promising Biotech plays) with their current capital structure...