A hilo de esto, hace un buen tiempo vi (y he rescatado) un artículo que daba info estadística: AT&T: How Investors Can Boost Their Income (NYSE:T) | Seeking Alpha
Concretamente lo hacían para ATT pero debería ser bastante extrapolable. Como resumen:
"The results for these 51 ex-dividend dates are completely one-sided. Expressed in % of most beneficial outcomes (i.e., the strategy that yielded the highest return), it looks as follows:
- Buying the stock one day before the ex-dividend date: 4 cases; 7.8%
- Buying the stock on the ex-dividend date: 14 cases; 27.5%
- Buying the stock one day after the ex-dividend date: 33 cases; 64.7%
An astonishing record 92% of outcomes favor not buying before the stock goes ex-dividend, thus implying that AT&T stock behaves in practice virtually identically to what we would expect per market theory."
Así que según ese artículo lo mejor sería comprar 1 día después del Ex-divi date