April 15 (Reuters) - London copper prices fell on Wednesday on persistent global economic uncertainty triggered by U.S. President Donald Trump's erratic tariffs, while investors awaited more stimulus from top metals consumer China to revive its sluggish economy.

The benchmark three-month copper on the London Metal Exchange (LME) eased 0.1% to $9,154 a metric ton as of 0138 GMT.

The most-traded copper contract on the Shanghai Futures Exchange (SHFE) fell 0.1% to 76,000 yuan ($10,376.70) per ton.

China has ordered its airlines not to take any further deliveries of Boeing ( BA ) jets in response to the U.S. imposing 145% tariffs on Chinese imports, Bloomberg News reported on Tuesday, citing people familiar with the matter.

"Base metals, including copper, drifted aimlessly as traders assess Trump's latest tariff moves," said Daniel Hynes, a senior commodity strategist at ANZ Bank.

China's economy is estimated to have slowed in the first quarter in the face of a prolonged property downturn as policymakers brace for the impact of the hefty U.S. tariffs that analysts say pose the biggest risk to the country in decades.

The market focus will be on whether China announces more stimulus measures to boost its economy as the tariff war with the U.S. escalates and worries persist in its property sector.

Meanwhile, Nvidia ( NVDA ) on Tuesday said it would take $5.5 billion in charges after the U.S. government limited exports of its H20 artificial intelligence

chip to China

, a key market for one of its most popular chips.

LME aluminium lost 0.1% to $2,373.5 a ton, lead fell 0.5% at $1,905, nickel eased 0.5% to $15,475 a ton, zinc was steady at $2,614.5, while tin rose 0.5% at $31,200.

SHFE aluminium added 0.1% to 19,635 yuan a ton, zinc lost 0.4% to 22,260 yuan, lead retreated 0.3% to 16,755 yuan, tin fell 0.2% to 259,020 yuan and nickel gained 0.9% to 124,700 yuan. ($1 = 7.3241 Chinese yuan) (Reporting by Anushree Mukherjee in Bengaluru; Editing by Sumana Nandy)