July 14 (Reuters) - U.S. stock index futures were mixed on Tuesday as investors braced for a pivotal inflation report and earnings from Wall Street's biggest banks, while U.S.-Iran tensions sent oil prices surging and threatened to reignite price pressures. .N

** Morgan Stanley MS.N:

** Citigroup Inc C.N:
BUZZ - Bullish on Grasim unit's Sprng Energy parent buy nL6N43G0BI

** Lulu's Fashion Lounge Holdings Inc LVLU.O:
BUZZ - Jumps on strategic review nL4N43G0QB

** Goldman Sachs Group Inc GS.N:
BUZZ - Earnings expected to jump in Q2 nL6N43F14D

** JPMorgan Chase & Co JPM.N:
BUZZ - Falls after lifting annual expense forecast nL4N43G0QM

** Apple Inc AAPL.O:
BUZZ - Slips after KeyBanc cuts to 'underweight' nL4N43G0VF

** NextCure Inc NXTC.O:
BUZZ - Jumps on merger with Avere, $320 million financing nL4N43G0X2

** Rio Tinto PLC RIO.N:

** BHP Group Ltd BHP.N:

** Southern Copper Corp SCCO.N:

** Freeport-McMoRan Inc FCX.N:

BUZZ - Copper miners gain as price of red metal edges higher nL4N43G0XJ

** Wells Fargo & Co WFC.N:
BUZZ - Rises after Q2 profit jumps nL6N4310TY

** Erasca Inc ERAS.O:
BUZZ - Down premarket after $550 mln share sale nL6N43G0OB

** Bank of America Corp BAC.N:
BUZZ - Rises on higher second-quarter profit nL4N43G0T7

** Phillips 66 PSX.N:

** Marathon Petroleum Corp MPC.N:

** Valero Energy Corp VLO.N:
BUZZ - Citigroup raises PT on US refiners on improving margins nL6N43G0OL

** International Business Machines Corp IBM.N:
BUZZ - Slips after preliminary Q2 results miss expectations; software firms fall nL4N43G14G

** Rithm Property Trust Inc RPT.N:
BUZZ - Drops after beginning $300 mln share offering nL6N43G0PZ