The main reason why retail investors can't get coupons is that there are too few sources of coupons in the stock market at present, and the supply is in short supply, which leads to a few sources of coupons basically in the hands of large securities companies. Large companies generally have large customers above a fixed level, and account managers will specifically lock in the sources of coupons, which leads to most retail investors often having no coupons to finance even if they have dual financial accounts.

Why can't retail investors get coupons?