Monday was a tough day for the U.S. stock market, but Tesla shares were hit especially hard. The stock fell by 7.6 percent after Tesla cut the Model 3’s price in China and CEO Elon Musk promised to reimburse U.S. customers if they miss a tax credit deadline due to Model 3 shipment delays.

Reuters reported this weekend that the Model 3’s prices on Tesla’s China website had been reduced by up to 7.6 percent, with the starting price now at 499,000 RMB (about $72,000). This is the third time since November that Tesla has lowered the price of its vehicles in China.

The first was in November, when it slashed the price of Model X and Model S vehicles by 12 to 26 percent, stating that it was “absorbing a significant part of the tariff to help make cars more affordable for customers in China.” Then this month, Tesla cut Model X and Model S prices again, citing China’s decision to temporarily suspend a new 25 percent tariff on American-produced vehicles and auto parts as the two countries reached a ceasefire in the trade war.

In October, Tesla announced on its site that U.S. customers needed to order a Model S, Model X or Model 3 before October 15 if they wanted the full $7,500 federal tax credit, which begins to phase out once a manufacturer sells 200,000 qualifying vehicles in the U.S. (Tesla hit that milestone earlier this year). As a result, the federal tax credit will be cut 50 percent, to $3,750, for vehicles delivered January 1 to June 30, 2019, before being halved again on July 1.

On Sunday, Musk tweeted in response to a question that if a customer’s pre-December order isn’t delivered before the end of the year, Tesla will reimburse the tax credits they missed out on.

If Tesla committed delivery & customer made good faith efforts to receive before year end, Tesla will cover the tax credit difference — Elon Musk (@elonmusk) December 22, 2018

After months of production and delivery delays, Tesla ramped up fulfillment of Model 3 orders in the third quarter of this year, when it delivered a total of 83,500 vehicles, including 55,840 Model 3 units.