BP (NYSE: BP) is suspending share buybacks and retiring the goal to return 30-40% of operating cash flow to shareholders, as the supermajor looks to strengthen its balance sheet amid intense shareholder pressure. BP reported on Tuesday fourth-quarter earnings generally in line with expectations, but the market expected more to see other metrics, such as debt and guidance. The supermajor’s underlying replacement cost (RC) profit, the metric closest to net profit, came in at $1.54 billion for the fourth quarter,…