Sep Nymex natural gas (NGU24) on Friday closed down -0.021 (-1.01%), posting the fourth consecutive decline. Sep nat-gas prices on Friday extended the sharp 4-session sell-off and posted a new contract low. Meanwhile, Aug nat-gas prices fell to a new 2-3/4 month low on the nearest futures chart and are hovering just moderately above the 4-year nearest-futures low posted earlier this year in March. Nat-gas prices were undercut Friday by continued inventory concerns after Thursday’s bearish weekly EIA report showed that inventories rose by +22 bcf, more than expectations of +11 bcf. Nat-gas inve…